Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dfde4517a842bb…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 16:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2020074ba85244b64b21134019dc2add SHA-1: e798404421dd8a62bb906c55676cf18f31c729f6 SHA-256: 24dfde4517a842bbc776e645a6ee7da7be2248e4a7165b8962e536823c23eaad
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, indicative of a link farm or SEO spam tactic. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous URLs strongly suggest this malicious intent. While no scripts were directly extracted, the PDF structure and the nature of the links imply an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?utm_term=user+id+linux+command PDF link annotation
    • https://mitezexevas.weebly.com/uploads/1/3/4/5/134525922/7040991.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/ejjOihU/41175848170.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/9860d56c3ccc.pdfIn PDF document text
    • https://sifapovidajep.weebly.com/uploads/1/3/0/7/130738911/fipubexojuxulijoj.pdfIn PDF document text
    • https://cdn.sqhk.co/pabulibig/Nie9Iji/repinunorapimufekexi.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/xomulujapim.pdfIn PDF document text
    • https://reravojune.weebly.com/uploads/1/3/1/4/131406269/lugok.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/3849529.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/9395409.pdfIn PDF document text
    • https://zetidepip.weebly.com/uploads/1/3/4/4/134432407/892822.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/salade/72062849540.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/rifatoxuw.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/sequoia_pitch_deck_template.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/88759327525.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/how_many_quarts_of_oil_does_a_2016_toyota_corolla_take.pdfIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_3576296b84e44888a37aa06ea5826993.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_8d66490bc1e34e528c7aacd640c9b8ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/makiluvuxeboroxi.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/xebasupilutokev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 4948 bytes
SHA-256: 2719f2669cd73be75a401ea445351a2781f0e3620b3b8f1aa804fd8bfb5fd403
font_01_sfnt_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 11600 bytes
SHA-256: ad388c6de6a5272958d7a6819d7b6cda67b0fb05e5b91d5e42caa8de434958b5
font_02_sfnt_off00011f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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