Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0c65a3eeeadc3f…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 12:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b6b30c0e102939e6fcda061a9f1cfb6e SHA-1: 69cc770e16bc35959fa360ab073fae1452be97ac SHA-256: fe0c65a3eeeadc3f3d7ed47db376aa6875f94134238ffee4af3677acdadb1f5e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a link farm with numerous external URLs, suggesting an attempt to direct users to malicious or SEO-spam content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://nipisod.ru/wix?keyword=groundhog+day+lesson PDF link annotation
    • http://dudisukogonox.iblogger.org/bilarogowuginanuzepobene.pdfIn PDF document text
    • http://italia-doc.space/bloc_quebecois_2019_election_platformvftjh.pdfIn PDF document text
    • http://fabermanufacture.ru/66154521515m9s1x.pdfIn PDF document text
    • http://rocketdocs.us/space_armor_2_mod_apk_android_12aclv.pdfIn PDF document text
    • http://kompledom.com/english_dialogue_about_covid_19bv1dm.pdfIn PDF document text
    • http://dujivodawalaxu.22web.org/fabonewapudulufusemove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_2ab7b8fe727a4d088cf8b124295d33ed.pdf?index=trueIn PDF document text
    • https://20e8ec16-a7ca-487e-906f-4b2d5c2744e2.filesusr.com/ugd/ab81b8_e6e57fff625f4c179e3ff6ab3e007406.pdf?index=trueIn PDF document text
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_630c22baa7e345699f083918bab2e4e0.pdf?index=trueIn PDF document text
    • http://vapoborino.rf.gd/new_apps_2018_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a235855b-e0fa-421b-9cd3-a0eae107c148/remuveve.pdfIn PDF document text
    • https://52cfbdcc-51c1-4e85-ba83-ad74149b4620.filesusr.com/ugd/93d431_68370d829dd5465c9621572115fd7c1c.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_e8d831c16af84b1d82e0effcd34501b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04d25d1-2c84-4c1b-b260-567e7c15d2d4/69080383243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0738cf18-bde9-499d-bfe1-b9ed4593ecb5/at_what_age_can_you_get_full_social_security_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b88367-2056-4674-aed9-e212db31a00d/what_is_the_singular_possessive_form_of_woman.pdfIn PDF document text
    • http://pitefabe.epizy.com/cadbury_silk_kiss_me_ringtone_free.pdfIn PDF document text
    • http://zudovufakigib.epizy.com/the_hound_of_the_baskervilles_1939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fecd37e-beda-4e5a-885a-b0801e218d52/barnes_and_noble_roald_dahl_set.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_2d616fd83c344fe19aa3a6b89842a4e0.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_off0000ea4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 5220 bytes
SHA-256: 17966ef340c0b5d2cc877f2a8b100f692926cdf241057894216ed1f10401e501
font_01_sfnt_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 11004 bytes
SHA-256: c95c988b22f062ed8c6fb48fd42fc20d396f2a57b8654ea5506b4da7fcbb22d5