Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4fa08fccccfc1a…

MALICIOUS

PDF

76.1 KB Created: 2021-03-24 19:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ba502bcea7613b913e2e8769af8c5783 SHA-1: 67e29ba7f1c149c57540f99a4dd6fd19fbce91c2 SHA-256: 3d4fa08fccccfc1a4c4c8183b6e75b7aedf34e3ff7e69469e3b1097dcd611f41
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to a phishing site or download further malware. No scripts were extracted, but the presence of many external URIs and the link farm heuristic points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=how+to+grow+a+romaine+lettuce PDF link annotation
    • http://baranaydin.org/what_does_555_mean_in_love6nt4f.pdfIn PDF document text
    • http://meetchat.space/xiruperekitar2jk80.pdfIn PDF document text
    • https://kesuwevibumeju.weebly.com/uploads/1/3/0/8/130814845/nisodokazufenu.pdfIn PDF document text
    • http://sqrab.top/folos8mjm0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_603166d8b31bb.pdfIn PDF document text
    • http://reawolt.online/polaris_magnum_425_oil_capacityubyb9.pdfIn PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/degolebor-vufibekix-xexugegof-pakavo.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/4081029.pdfIn PDF document text
    • http://bbflowers.net/65572498746odhfu.pdfIn PDF document text
    • https://voganesabif.weebly.com/uploads/1/3/1/1/131163538/nimefevaw.pdfIn PDF document text
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/ludetisupo-navifebotodel-winobin.pdfIn PDF document text
    • https://gikuxowatevu.weebly.com/uploads/1/3/2/6/132681634/sarapowovebif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5fd39a0082cd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0344c9-90d8-4228-abaa-ab56d99138fb/esther_ahn_kim_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/90632845.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/bigejetibapelavu.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/what_are_the_warrant_officer_ranks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca0b2e0-8d43-486e-ac71-23d91f8be969/97437400674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e989477-b0ed-43e7-9b41-7bd83807dd2a/katenapodepurofidiralusop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/320b2247-0caa-4bd6-8df5-5a2c19fdd09b/wuduloki.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/ielts_writing_sample_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9252d744-43e7-408d-ac14-1e66457c4e6a/tikefararugenib.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bcbs_medicare_hmo_prior_authorization_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 4992 bytes
SHA-256: 78ea1ed9a0aec4539f476214d2aed5935d620a521350b8c13752ce8b60d688c6
font_01_sfnt_off0000fd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD08 11012 bytes
SHA-256: b6e3eef6f8461dd23e10eab0e7582390817493bdfd92c734d1edcf0bfe7f3983