Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f7b7cf2cc9e71e…

MALICIOUS

PDF

67.7 KB Created: 2021-09-02 21:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0b0d0c8e848cd31e1e5356d65b79ca69 SHA-1: 7091962a930036558efd76a6f7d972a8779c2974 SHA-256: 87f7b7cf2cc9e71ed3149a9c63bfd7cc90d60762ef22a8200740eae4bf3292e8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure with an image-only design and a click-outward action. It contains numerous links pointing to potentially compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute further malicious content or phish for credentials. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a malicious intent to redirect users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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 http://studionegro.net/userfiles/files/gafodisejovonopapuduzana.pdf In PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/nekaxopisibosedij.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/22745521758.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/rifisokala.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210610071517182.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/kiwigoru.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/vorepokarafax.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/2358118758.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/mijawenizaxileguwawibe.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607efdd575efc---zitanugatowumerowote.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/9971572391.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kamujosetufu.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/fuwiwedudeteji.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106161213323569.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726cb4dbb87---59315902913.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/joteo4pr2pj7t0g5bhskadm2f2/nojifugazojoriniwuxeza.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/jilosedesivowafiv.pdfIn PDF document text
    • http://gptools.net/userfiles/file/wobabipufitikojomedafanof.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/44180206076.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16101125de1add---gelexamijadawite.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/47700434844.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/9189454543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=rubber+testing+standards+pdfPDF 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_off0000adb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADB3 10792 bytes
SHA-256: 151a87c4e0f1d29967fd94d76475d4c7dae511c13118c8ea873170e00cd6cd63
font_01_sfnt_off0000c645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC645 14308 bytes
SHA-256: d2d2526b47e31c64d209bd7bd7c685255844a31c1d8554226cf0e9c488d5e3cd
font_02_sfnt_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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