Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8346c67282cafe…

MALICIOUS

PDF

69.9 KB Created: 2021-09-10 19:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d1c6cbd7e2d6b510586ef62e19791038 SHA-1: 8eaf903a6d301e5b1f3d5560609d7312aca487c9 SHA-256: fe8346c67282cafebf215b8702ebdc3e67392d3363dc3e85c519aff9752e1c03
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://aimhc.com/userfiles/file/34426036205.pdf In PDF document text
    • http://salonorganica.ru/upload/files/parejim.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/5819005934.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/koliwivotilo.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/nubotetelofibozaman.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/59004778372.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/zelowekiwuwes.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/31355161483.pdfIn PDF document text
    • http://sport-zavora.cz/data/file/lawinenumiti.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/97083934536.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/48400833557.pdfIn PDF document text
    • https://zzhqhi.com/d/files/95344357425.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/xobixosagesitudinuwa.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/45845332560.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/63763484213.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/jonesazinibajeped.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/84524580629.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7476bc9f---jinuwez.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/toledipedewuvura.pdfIn PDF document text
    • https://shinaltd.ru/images/file/85783559670.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/72935147902.pdfIn PDF document text
    • http://aminotp.com/upload/files/90648827054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=dragon+mania+v2+0.0+mod+apkPDF 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_off0000ae1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1C 10756 bytes
SHA-256: b0f69846c8375f2c43712af2406a643353ef5c06b4039c4d829305961be87447
font_01_sfnt_off0000c691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC691 16392 bytes
SHA-256: 8b1f4cc1096f2339f4144b8622703282726f4b8354a75012a6e5fc5bb76294a8
font_02_sfnt_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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