Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7695f0c056799d…

MALICIOUS

PDF

73.6 KB Created: 2020-11-14 09:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3950930c59dbf14a391521c744ea3fc1 SHA-1: d39d21186a03d6713bbfaaca6903b4313eff4e87 SHA-256: 2d7695f0c056799deee2936d6ef9d8cb0f135eaebe032abfa235d49692c9bf00
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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.
  • 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://traffnew.ru/123?utm_term=mashed+potato+quantity+per+person PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5fa2baa80eeec.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/1696541.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/keporobore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5fa19744ae8fa.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/vuraradaso/mivirelifuzegodetu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/anycubic_chiron_bed_leveling_thingiverse.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/12034376916.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/autodesk_revit_architecture_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/72307289233.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/51748579448.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/bjcp_2015_em_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/pankaj_patel_md_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/xoduropomegalawum.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/bwv_846_prelude_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/36507205353.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_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 5128 bytes
SHA-256: 1d9ab4b9cd9d6921fbb77a2d7cee1d86840ae399d54de1310a4c5862256f4758
font_01_sfnt_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 10532 bytes
SHA-256: 93b986dec693ae38d70233470b3a2da7a2d177b3847ad13762af30aecf2ad393
font_02_sfnt_off00010b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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