Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea2c2ba904e258f…

MALICIOUS

PDF

100.8 KB Created: 2021-03-22 09:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 81e54b203e9ab793ce978353bb1e7abd SHA-1: b089c3b9161c700cd2d0fcf2fd287c5aeeb86b9a SHA-256: 9ea2c2ba904e258f53b2de97b181701e2cdea222ab025f88155d4f70a0dce0a0
186 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. 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/123?utm_term=hdmi+to+vga+converter+cable+driver PDF link annotation
    • http://roskycnmx.com/zerusutobabadujubip84tfv.pdfIn PDF document text
    • http://hushseo.online/pajimuxufajofo45fhm.pdfIn PDF document text
    • https://kawififelotus.weebly.com/uploads/1/3/1/4/131437833/rupegepakopowavexati.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/2118231.pdfIn PDF document text
    • http://karaulovlife.site/belanol4mowb.pdfIn PDF document text
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/67aceb1af91a31.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/jdTrija/darkness_and_flame_missing_memories_bonus_chapter_walkthrough.pdfIn PDF document text
    • https://memagakotis.weebly.com/uploads/1/3/4/7/134760483/muvil.pdfIn PDF document text
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/vunoxilekazivodepe.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/UkgedF0/33041175126.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_869eacaeeb8041ecbc2689a7dfa94ac1.pdf?index=trueIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_1fda7ec81d1546098951a3e20265866d.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_99e9b81408b84a0badf8b599504879df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c430a08b-db20-420e-a972-2d0b3411b8df/deadlands_players_guide.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_c6e6c5c9a3df405e8e882c3eacc92e55.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_2de177dc69d64d099e40c54d474426d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ec2c53-5cc4-4892-846f-9ad69fe818df/xedirorujuninesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1cc537-acf0-4db8-bb80-5ef49bc4e8da/growing_tomatoes_in_south_florida_summer.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_d98d808dfdd94bd2bb4e64d64de92c81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2f80f7-b882-4f43-beed-32cebbb9e9fa/56543616836.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_d557c0bc105646fe9ce9c1b133491047.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_ed17a4810f0646eaa2c4ecff715a47b5.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_off00014a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7C 5240 bytes
SHA-256: b918d2c72da1c08cda1eddae8034114005a3bd84eaaaf6bdac14bf24ed491ea4
font_01_sfnt_off00015c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3E 12236 bytes
SHA-256: 1d7304926793eb98c4c382fae322ce7dc93f8b8812c1a67620ab1562fbc7f0de