Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bc38db6cbfc64f…

MALICIOUS

PDF

89.0 KB Created: 2021-03-09 08:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d645031290fbc2a58e8dfb6ddcbe99a2 SHA-1: b8840db312e510ff3688929e12a49c3b18309dbf SHA-256: a0bc38db6cbfc64f399b714c4641e3f1c3afe47d86f9c69bd177f4e938b31f5d
204 Risk Score

Malware Insights

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

This PDF file is classified as malicious and contains numerous embedded URLs pointing to potentially malicious redirectors and disposable hosting. The 'SE_CALLBACK_LURE' heuristic indicates a phishing attempt, likely a tech-support scam or a fake billing/refund scam, encouraging users to call a phone number. While no scripts were explicitly extracted, the presence of multiple malicious links and the callback lure strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=civil+war+roundtable+of+the+ozarks In PDF document text
    • https://cdn.sqhk.co/nojedajoze/ZVjdhid/zituje.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/61196912434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_60465191ef5e9.pdfIn PDF document text
    • http://zotonurapad.22web.org/53442059280.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/jaguvubutadafapupewubum.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/hp_laserjet_p1606dn_change_ink.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/vutakogeximufotag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492580/normal_5fd8eb29c720c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_6033e67f1baf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_60309f7a91392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_5fc7787f974c1.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/30635634820.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/idXjgji/preview_plan_your_instagram_full_apk.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://uploads.strikinglycdn.com/files/5ab77966-a714-497f-bf61-ba725b3cca8f/jixamuwusarod.pdfIn PDF document text
    • http://zezevefo.rf.gd/napunokutozazumedupa.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/62690957907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75de4add-cb67-431b-af87-dbe99584a861/butajepuxesupananisako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5c3ea1-da63-47ad-92a1-9e5f5dd03ac6/data_structures_in_c_geeksforgeeks.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/13341269919.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/towexumijivijunizimo.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/worksheet_on_laboratory_safety_rules.pdfIn PDF document text
    • http://vagoposejexuma.epizy.com/82276039843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896b360d-70dd-466d-9071-29005d0c21aa/logitech_g900_software_mac.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 5304 bytes
SHA-256: b38022b4b38283d6af4f6a59f208884b29fe17962454de24146bd99d01052395
font_01_sfnt_off000123c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 10720 bytes
SHA-256: 6d5ab49f6f46d75c14078ffda561b2862c0bed3836b858eefc7f463265e1cc49
font_02_sfnt_off0001485a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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