Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68c34dea7979d07…

MALICIOUS

PDF

73.8 KB Created: 2021-03-15 02:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9596c0e523c6cee3c170ce8d4dd36de0 SHA-1: 308badc19ce0ba02d12da93acfaac0013dc8f662 SHA-256: e68c34dea7979d07012e9e2913425a7e640182da5ae55a60f222cf7ac6aa18fd
206 Risk Score

Malware Insights

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

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 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=are+there+any+recalls+on+2004+jeep+grand+cherokee PDF link annotation
    • https://cdn.sqhk.co/surodamiz/ihxzEgd/advisory_council_on_historic_preservation_members.pdfIn PDF document text
    • http://gafujovinotu.22web.org/11476547189.pdfIn PDF document text
    • http://rivabowukufujel.iblogger.org/learn_english_through_story_level_2_the_old_man_and_the_sea.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/jhgjgij/58929299363.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_7fa8d12834f84339af9cd49ca3754fa6.pdf?index=trueIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_f039ecca62084e019ab42a1f26cc9ffe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f6afb3-6a00-42a8-bfe8-77b49e07ad7e/propane_auto_changeover_two-stage_regulator_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/60185951189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60636ff8-55ac-44ad-925b-77303fd2864d/83082656447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394ab94c-5336-4ebc-857c-46dfacb4be4c/mtd_gold_lawn_mower_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/lonekos.pdfIn PDF document text
    • http://solepaf.epizy.com/jatoz.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_1ab4d9cbcb564fd58698b0d5f004bdad.pdf?index=trueIn PDF document text
    • http://keputeka.epizy.com/67098367544.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_000f8e50bc8c42bdbf2e05ae12741f89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxorojero/sitap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959d4476-4a11-404d-b66c-041d0feb5bb4/xexerobojarokovedakor.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/carmelite_breviary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1964d9-425a-4895-b84b-782712e07e22/74651761259.pdfIn PDF document text
    • http://rivoteb.rf.gd/zomujekasidovidegine.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/epf_withdrawal_form_31_uan.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_9e889b84a56d4cf98e02950e23b8d8fc.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 5668 bytes
SHA-256: 45c387254c30c137b9809f659b6f72b6dcc6a3fcd00dbbf172a0a03b05a7a96a
font_01_sfnt_off0000e856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 10292 bytes
SHA-256: c9e7cf40259ce2f863d3c52773cf32eee958fea7c99841a7ce80ce57c408306f
font_02_sfnt_off00010b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B88 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378