Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85a67e66e5c6996…

MALICIOUS

PDF

67.6 KB Created: 2021-02-11 15:38:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ba4f3d3ec058849a1d4ea3cf132d6a91 SHA-1: 57fbece32d2183fc60df3c6102f1e7f73250c6e9 SHA-256: b85a67e66e5c6996618c4ea5c1095d7f04416d0ace6ef0b8c7296c6b04c48c40
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=5.2+exercises+verifying+trigonometric+identities+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380226/normal_601f432c03d78.pdfIn PDF document text
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/b490b84d2958a.pdfIn PDF document text
    • https://povazolanatul.weebly.com/uploads/1/3/0/7/130740072/wozadusojub-relago-fiwovuzimaj-busufope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_600d19e26d810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419441/normal_5feea249d5241.pdfIn PDF document text
    • http://itsamorem.com/dicionrio_de_rimas8934x.pdfIn PDF document text
    • http://svoydvalend.xyz/does_android_emulator_need_graphics_card8ewj1.pdfIn PDF document text
    • http://jegagavakunumog.iblogger.org/periodic_table_extra_practice_worksheet_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xepepofebaxuvib.epizy.com/vetopilajonit.pdfIn PDF document text
    • http://mogopubu.epizy.com/49225918041.pdfIn PDF document text
    • http://rebivik.epizy.com/mixed_punctuation_worksheets_grade_7.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/doh_health_calendar_2019_philippines.pdfIn PDF document text
    • http://lexuwusifo.epizy.com/folifubivapukoj.pdfIn PDF document text
    • http://napalujimawoz.rf.gd/wesimonumu.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/70477557980.pdfIn PDF document text
    • http://vuwamim.rf.gd/bandish_drama_episode_14.pdfIn PDF document text
    • http://zeluwaboder.rf.gd/51803998877.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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5824 bytes
SHA-256: 7a935a633497505f017bbc9be32260750a3d3b2f7318b4ac21d28542313cca97
font_01_sfnt_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 10524 bytes
SHA-256: bb89bc307da4b80d1d37d4cf5afed617a14697b214b36bf124df03ee04bca5f4