Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29115c846c6629c…

MALICIOUS

PDF

80.2 KB Created: 2021-03-19 22:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7a37648beb668c0fa425e34b51a8dc69 SHA-1: 4c1cc8511af4d51da76b68731f6d886dc6d0ad87 SHA-256: d29115c846c6629ca5161a8c758a577986c7b33f9f840bd6774465c35e8359e9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains commonly used for SEO spam and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing or spam campaign.

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://xezojetit.ru/wix?keyword=ozark+trail+6+person+dome+tent+rainfly PDF link annotation
    • https://cdn.sqhk.co/zasokolof/MidirH8/33786733954.pdfIn PDF document text
    • https://jipubegu.weebly.com/uploads/1/3/1/0/131070098/mabavonuvokokebefe.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/IgjpigX/jebusi.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/Uijghhh/lifetime_maximum_care_warranty.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/e2thiPZ/zanekig.pdfIn PDF document text
    • https://pixelisikug.weebly.com/uploads/1/3/1/4/131407736/972f9.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/jajd5jg/nakulagoxivukaduduwepovuw.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/cNhiOjj/terry_kiser_weekend_at_bernie_s_3.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/3iahbOk/cure_in_chinese_language.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/gggicge/jidisepujubozeji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/getizar/guided_science_readers_level_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5638a8e0-a566-4053-b0e8-96808507ae23/how_to_set_up_mainstays_tension_pole_shower_caddy.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/kafutejodemoxibutoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/duzajipidefo.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/doorbell_transformer_humming_noise.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/java_ee_maven_tutorial_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/marley_cooling_tower_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/comedy_videos_free_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/how_to_use_voldyne_5000_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125eb6bb-3111-4a4f-af64-46da8622dbb9/74089051238.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_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 5584 bytes
SHA-256: 66e4d5358e7771dcc76108baf30b01460d1e03237c9e32fb49513dbc5ecd0171
font_01_sfnt_off00010e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0A 10948 bytes
SHA-256: 653aa2bc8f2b14b5dbe1d7caa3baaf6b5defde01e054cb6ed98026f439857fd2

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