Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ba17aa1e30006b…

MALICIOUS

PDF

85.7 KB Created: 2021-03-07 19:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2e48b167d5a62b6329ce8a247c487cc8 SHA-1: b06a53d18388621e21ef4526165a68d8b97cfe2a SHA-256: f6ba17aa1e30006b1ba212180153faa96605c1f790a376c64bc4d0e3e8f752ae
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=inception+hindi+google+docs PDF link annotation
    • http://ig-copyrighthelpcenter.com/sar_tech_3_study_guidefrojq.pdfIn PDF document text
    • http://fudasoba.iblogger.org/jolade.pdfIn PDF document text
    • http://erogan24.website/ritual_sacrifice_goat_simulator_ps4exgra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408462/normal_5ff17ad5520ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5fda4035bd777.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/Fidhqhe/puvare.pdfIn PDF document text
    • http://ecoterritory.store/8130346763483dhn.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/c9je5hc/words_jam_connect_crosswords_vocabulary_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/bgelkgc/18505888476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_0aa18c83ece44b20acb9cd44dea9beff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/905077c3-41fe-4a9a-a116-fb0ec47c21d3/neato_vacuum_d7_review.pdfIn PDF document text
    • http://rerorupi.rf.gd/flowers_algernon_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5ad83b-fbc5-4674-9540-203e3db640d7/jikujufoso.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_85c3972358cd467584f3dad470cddb39.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 5016 bytes
SHA-256: bb4ce026afbcbc116706d2f551b8edec4eaca104d5a29996d3929e38d38b6d76
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 4964 bytes
SHA-256: 7ed8d6e2620f63f71592629582879d36b98f84e5c9e843af3b14bca675c365ab
font_02_sfnt_off00010e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5B 10564 bytes
SHA-256: 37a2cf8656856e43a25f454cd3235d5950cda30cbcc0f1c725776e5864f415c1
font_03_sfnt_off000132bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BF 16556 bytes
SHA-256: 0b5bbedbef6ce11d470db893ae5fd58827c309b6494b100c8898efa667536f1c

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