Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06962a5cfe24745…

MALICIOUS

PDF

79.7 KB Created: 2021-05-02 21:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0dc30ad18a565de8216fe3eec2cdce4 SHA-1: 2ca16cbf924825d81d38514a30b4c8cc0cd796df SHA-256: b06962a5cfe2474518e81141d88f37360a6ffbed3ff421622a3871ee654ca83e
86 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and exhibits characteristics of a link farm, suggesting it's designed to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is intended to trick users into calling a phone number, a common tactic in tech-support scams or callback phishing. While no scripts were directly extracted, the overall structure and heuristics point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://gimoguvi.ru/strik?utm_term=how+many+calories+in+a+dunkin+donuts+latte+with+skim+milk PDF link annotation
    • https://cdn.sqhk.co/feketukadoz/hifhdXy/95171348885.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/mdheiiw/fanatical_car_driving_simulator_hack_download.pdfIn PDF document text
    • http://peskomment.ru/post_office_card_account_contact_numberwcdfd.pdfIn PDF document text
    • http://uscarins.info/92209887733jw718.pdfIn PDF document text
    • http://rejonanujezeke.22web.org/97282636752.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/gtjdSjd/download_game_boy_apkpure.pdfIn PDF document text
    • http://vvd.bar/cessione_di_fabbricato_modulou1xft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496810/normal_602ad8cbb32d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463306/normal_5ff82c9e1b3f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5ff9f462b93c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_60271fdc3f3c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fcda029d2775.pdfIn PDF document text
    • http://curvepreloved.com/chinese_drama_2020_eng_sub66h31.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/YjfVigV/sword_knights_idle_rpg_premium_mod_apk.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/32487859957.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://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_db334b7c389b47d8823d29db0e59b984.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_bb2a972a8f3c407cafe6993067ea7bba.pdf?index=trueIn PDF document text
    • http://wedemato.rf.gd/map_projection_methods.pdfIn PDF document text
    • http://lojifasipok.rf.gd/wevexumujix.pdfIn PDF document text
    • http://puzamurepedo.rf.gd/alimentos_ricos_en_zinc_y_selenio.pdfIn PDF document text
    • http://panadokopejed.epizy.com/jntuk_r13_percentage_calculator.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_2df4e025baa14877b2a73e4644ad8e34.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_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 5280 bytes
SHA-256: a26096ae3dc844b56f5f8b2864dc69c3fee46b984582c27d2b5361851390f003
font_01_sfnt_off0000fa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 11500 bytes
SHA-256: 90bc508a352c7c11103c91354063b4ac6e76922da39e255dbef2bfecc74da1f5
font_02_sfnt_off000120fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3