Malicious PDF — malware analysis report

Static analysis result for SHA-256 e622569d42bc3098…

MALICIOUS

PDF

92.4 KB Created: 2021-05-20 11:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd4c6405f803ee701136c48026bcb214 SHA-1: e7044fce4cda46482f3ee41db00836a2b768a4db SHA-256: e622569d42bc3098659d5a700148864d23ae982203c3ff465092f37b76dd5e4f
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 0.9994

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://jumiwimov.ru/strik?utm_term=are+tiger+moth+caterpillars+poisonous PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413362/normal_6007ccc21b2ff.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/b8845c0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_605cff2b50608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_6013c10fdd2e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467318/normal_5ff1b715b7566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_602023a85bbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_603ef07f5e1a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5fce0727f20fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_6023c637e33bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_5ffa72ea8996c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379221/normal_5ffcac691abd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_6066ea97e11ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_6068ea3d76212.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/milagon-fogesoxavetip-zuguzi-vubofuzitijele.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/wiwamoxamo/mubupatavu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/urgent_hypertension_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/adobe_photoshop_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/free_5_point_scale_template.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/root_redmi_note_4_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/install_adblock_plus_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/jebowafifi.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/fluval_fx5_parts_diagram.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_off00011b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 5220 bytes
SHA-256: ec5e4632b80a21c12f6d017fa699e73975331fe1866dda1cf8b46a3256ae60d8
font_01_sfnt_off00012cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEC 11872 bytes
SHA-256: 1ad96f835012e6b7138e253ab18995f144d8f72e509671d148e18f2dcbbda4d5
font_02_sfnt_off00015469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15469 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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