Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e2e37a89f792df…

MALICIOUS

PDF

73.7 KB Created: 2020-12-06 12:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2f1f5b638421cbf0593020e4f4bbd70d SHA-1: 6b4f81f177514a2a5e024a46ab7f51774e1fae3f SHA-256: b1e2e37a89f792dfadb3b590916fe348ed1cf3d187d126cefa37f64a16fb8a0c
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains heuristics indicating it is a link farm and uses a password-protected archive lure, suggesting a phishing or malware delivery attempt. The embedded URL points to a suspicious domain, likely serving a malicious payload. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://trafftec.ru/strik?utm_term=spy+mouse+apk PDF link annotation
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/e6258c2ee9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_5f89a00877ac7.pdfIn PDF document text
    • https://zetidikusas.weebly.com/uploads/1/3/4/7/134740093/dimewetuwub.pdfIn PDF document text
    • https://bujupejokoluga.weebly.com/uploads/1/3/4/5/134576849/tanemu.pdfIn PDF document text
    • https://pavedivagew.weebly.com/uploads/1/3/4/4/134468388/f9578171035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5fbe55f144212.pdfIn PDF document text
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/71feb5d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5073312facd59cec7706f/t/5fcad6a16e74d26c6ff27a65/1607128738077/zoginaxusadepafas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf657c3570fb44d1fac2db/1606378877561/tudinasosazoruniliwovefuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee6f45ca4f790264ac86/1606217328703/30435642191.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf66b0eaf37e3b6493fa05/1606379186036/sejegizanefixojigok.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/21613574051.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2771f9dcb35a866f23eb/1606231921425/xawijepu.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/zakilegixafaxog.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 5108 bytes
SHA-256: 776a8fb97bfb463a81dab99a2b6287794216b53724fe134480d3c14dd8ea97f6
font_01_sfnt_off0000df03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 11164 bytes
SHA-256: 202fa96fbffc5e0a149ccc36281510152701160eed31049caeb877ecb7ca6057
font_02_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 16264 bytes
SHA-256: 00e5034bf99f3d6efe00a25a3bfa276cf159795ad76b0562490920772022da12

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