Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e0ac36370b7183…

MALICIOUS

PDF

83.2 KB Created: 2021-03-03 18:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8dba09e1b39d0aa1d569ff6dec2a54b3 SHA-1: f73927063aef8920f38810519b009826c9fe8317 SHA-256: 44e0ac36370b718313f0697496939e7fe0b8abe5239bc2375ccc5d382129ed56
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, indicating an attempt to generate traffic or SEO manipulation. It also includes an embedded URL pointing to a suspicious domain, likely intended to redirect the user to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://baarspo.ru/award?keyword=what+is+a+healthy+diet+for+an+active+athlete PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408197/normal_5ff3bbf708720.pdfIn PDF document text
    • http://lightstart.xyz/210183827740natb.pdfIn PDF document text
    • http://goodshopsales.xyz/android_activesync_office_365kmbh5.pdfIn PDF document text
    • http://fasad-dom.site/16879683237nyf4p.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/1942620.pdfIn PDF document text
    • http://sentytld.online/balupu_telugu_ringtonesh1tmn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5ff259bed3295.pdfIn PDF document text
    • http://7gusevshop.space/movie_maker_pro_reviewsagbxk.pdfIn PDF document text
    • https://makesagesuli.weebly.com/uploads/1/3/0/7/130740055/2193483.pdfIn PDF document text
    • http://cardioactiveitalia.site/kazegudebadelubpds2.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/jirebonudur/5013095367.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/xewedixifuwawa.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/22671716362.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/36960573277.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/puzafidexidudadefelofupek.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/jasoximiboxavawupanixigi.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/65049494963.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_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 5072 bytes
SHA-256: 6302018b6de284697b407c2ed502fc719f62524be100b912ec8b319c9de0cb1d
font_01_sfnt_off00010d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D97 10376 bytes
SHA-256: baad10f0982590fe58b8a7138ffa587a8a13fa25ba59027536487690a45d98f3
font_02_sfnt_off000130c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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