Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f6517dd08ee176…

MALICIOUS

PDF

72.2 KB Created: 2021-03-16 06:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 71be7dbb397fd4d4ead2995de4c2a202 SHA-1: 516fc9d5358c6edd837e09b3480bc576e00aa9c2 SHA-256: f9f6517dd08ee176257c604531c0ed7ff0133c026e8faa55e96124543e23491c
206 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of a callback phishing lure heuristic further supports the intent to deceive users into interacting with malicious content or providing sensitive information. While no scripts were extracted, the structure and heuristics indicate a high likelihood of redirecting users to malicious websites.

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
  • 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://vilenefex.ru/wix?keyword=pennridge+south+middle+school+lip+dub PDF link annotation
    • https://dopozigixojak.weebly.com/uploads/1/3/4/5/134509916/d855a59c33e1be2.pdfIn PDF document text
    • http://kewunorivibaro.22web.org/bleacher_report_san_antonio_spurs.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/QOgj2YS/dinosaur_sound_effects_mp3_free_downloads.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/iehb4ii/vogepevusa.pdfIn PDF document text
    • https://mozibidu.weebly.com/uploads/1/3/4/7/134763316/nalidow.pdfIn PDF document text
    • https://cdn.sqhk.co/sapekuzob/jbhaHjf/core_java_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/ramojezi/eJphijg/nut_and_bolt_supply_near_me.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/afd88a6.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cidjdvo/fubevi.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/aqih4BB/earn_to_die_2_unblocked_games_24h.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/hbSjjgf/party_music_2020_list.pdfIn PDF document text
    • https://jivekale.weebly.com/uploads/1/3/4/3/134319103/vefen-bowuliziluke.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/dx5UijO/kanigujafetutopap.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/bidhbia/impossible_quiz_answers_level_45.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/xupevalerebasu_kiruxafimerok_pelexabosi.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/wisadukoradu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_151fbcd794d04d598bed764e4efcc266.pdf?index=trueIn PDF document text
    • http://bumitorazefi.epizy.com/73413903514.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_9f5675e8423443cbb9e38222ac5571db.pdf?index=trueIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_196be9e54b7742a5917034eec3326e8d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 5420 bytes
SHA-256: e0cb91f421452e88194b1cbfb9153cd02f2ec1348e72f2a8de7fd8810782e6f1
font_01_sfnt_off0000ebdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 11256 bytes
SHA-256: 2972bee34c0025f2ce8741b8297ac75d819a09f43be7cebb992c559d4ad420a2