Malicious PDF — malware analysis report

Static analysis result for SHA-256 d050840f458bde91…

MALICIOUS

PDF

63.4 KB Created: 2021-01-27 08:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4266dbdd4677d95ed1d4135ce8676d54 SHA-1: b4c9345212c633b62041ae86848b80fa2082821e SHA-256: d050840f458bde91ba619124550d26059ddd9f0bda7a09cec7fac4db4726301d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common tactic for SEO poisoning or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=neighborhood%20market%20colton%20california PDF link annotation
    • https://gopopozemilin.weebly.com/uploads/1/3/0/8/130874381/tamexedowaxawu.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/jdcIzks/alchemy_definition_simple.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/l3MDWgf/how_to_play_go_fish_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/iigpjcx/freeciv_port_5555.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/pififAf/monster_busters_hexa_blast_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/aHEdjiU/anime_hero_2_evolution_ps2.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/yjhohdf/10417964350.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
    • http://rexenejo.epizy.com/flagstaff_ski_snow_report.pdfIn PDF document text
    • http://sefeluxezilire.epizy.com/19376256641.pdfIn PDF document text
    • http://galiwasik.rf.gd/donomixaludoxaxif.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/gumafo.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_off0000aec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC3 5216 bytes
SHA-256: 70b959ab3f55ec28616e690e1d4f8b453d4e1d925582e2e0e6f41493087a2356
font_01_sfnt_off0000c059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC059 10088 bytes
SHA-256: 6552204035bd10c0ad66c49ba27d7c3bf29f29049d23800409b3ee0fa6e59896
font_02_sfnt_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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