Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca2ec3b553724b0…

MALICIOUS

PDF

88.8 KB Created: 2021-09-19 12:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f09c1dd77416f018e3daffb91778d23 SHA-1: d946687d6f21b91b3b5a68a1557640b364125cc5 SHA-256: eca2ec3b553724b03e7092cf3efecab05e32866fb92d813424d326640c06695f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, and it contains heuristics indicating it's a link farm designed to host PDF files. Crucially, it includes an instruction to disable security software, a strong indicator of malicious intent to facilitate further exploitation or payload delivery. While no scripts were directly extracted, the overall structure and heuristics suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • 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 http://tcsklife.com/filespath/files/20210903034936.pdf In PDF document text
    • http://sake-tori.com/images/library/File/dunibidarejugudike.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35434753159.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/nejaxobijolufimiforutemif.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/70914162345.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/vofosimad.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/jewejasokejadevowejijavi.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109161718301487.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/regokopalapejarilele.pdfIn PDF document text
    • http://yilip.net/userData/board/file/laxeg.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/75177831353.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/54144588496.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/80452613477.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/lulazonixuji.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/tomeverax.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/33655501281.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/69708384439.pdfIn PDF document text
    • https://ibextrail.com/editor-images/90698468800.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/juvoj.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/85228994697.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/mexebokuwifurujatuze.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/73906088701.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/875238181.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/pajufosebamiletupasibe.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/tusedexuvu.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210904110719_960732456.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/69719569093.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=terraria+free+apk+full+versionPDF 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_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 19180 bytes
SHA-256: d0d248e38c3b22c8f174de14f8f725546cb7ee172fa98e8ffd1b4f96b019ee04
font_02_sfnt_off00013d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5A 10476 bytes
SHA-256: b0cc8479e7b285463c5d01a5bcbda98f9bc97d5388e3168d9f2408e10e7ff229

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