Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abf2da1ffda7531…

MALICIOUS

PDF

85.4 KB Created: 2021-08-08 03:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 225e10aeb922db39aa2be4bddd223cd0 SHA-1: e4e931ce09f5e41acf0108691f32ff6779635b3c SHA-256: 1abf2da1ffda7531244aba3edde4513b92cf77e4b9a8054a89168296d85cd36e
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress installations and disposable hosting, suggesting an attempt to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware via a link that mimics a file upload or download button. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/02ffa01bf6605ef104be7ae82801cadb/35478420340.pdf In PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ef88273c1---32293449689.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607323a2e186f---95378573135.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/numubuxotuxesivaxobu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9cb8a00db---44484355475.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/girijeruxojevufakikogi.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8db3c2cf9---juxituziruk.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7b0a629a4c---47695038283.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/40355732090.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hebvqk53kau1luu5kcde83fig7/94609392127.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/351e12fec10c1ac145bd9c45276d50fd/givabavuzujidiluvutavuwa.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/22943530790.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/59263786251.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/setogeg.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/93778444396.pdfIn PDF document text
    • http://jucal.es/images/file/82221366533.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/95048c2393b4cb8be080dd4d4dd8bcc3/76036402803.pdfIn PDF document text
    • http://abpaluso.com/upload/file/zutuzuwamonunutemadi.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210728131514_98078831.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d550a1b36c---mefisukunu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731b6d2b83d---wivarekadoz.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/naxikazipin.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/xedusunevetizisiru.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/monozifutazezegonan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cowin+e7+stopped+workingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 17592 bytes
SHA-256: f89e0c66ead55a6275fb9bcdb77856000cfded3c2b5bfa59aaeecbf7f83a1281
font_02_sfnt_off00013050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 10620 bytes
SHA-256: 0343620b9118924abd1cff1684acedca98dbd6581cdef9f1d0f82380a94454c4

Open this report in the interactive analyzer, or submit your own file for analysis.