Malicious PDF — malware analysis report

Static analysis result for SHA-256 7297799c0d9bc255…

MALICIOUS

PDF

78.2 KB Created: 2021-01-15 00:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2375383229cf47a66cd71cf5f5d19f64 SHA-1: 7ea85655d39e6a6ac59012e8ac70044106a690d7 SHA-256: 7297799c0d9bc255c04db8431a0071acb4b8aaec8f0d26be5f51538db27c4a84
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The embedded URL 'https://trafftec.ru/123?utm_term=hamburger+america+pdf+download' further indicates a deceptive attempt to redirect users. ClamAV and ML heuristics confirm the malicious nature of the document, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?utm_term=hamburger+america+pdf+download PDF link annotation
    • https://site-1193936.mozfiles.com/files/1193936/bmx_bike_racing_clothes.pdfIn PDF document text
    • https://site-1171882.mozfiles.com/files/1171882/the_king_of_fighters_movie_300mb.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7007845.pdfIn PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/rope_roller_coaster.pdfIn PDF document text
    • https://site-1168389.mozfiles.com/files/1168389/katepi.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/labipuzibil.pdfIn PDF document text
    • https://kekageguva.weebly.com/uploads/1/3/0/7/130776826/8462449.pdfIn PDF document text
    • https://site-1172519.mozfiles.com/files/1172519/4559770739.pdfIn PDF document text
    • https://cdn.sqhk.co/gikazijegut/ifH9oii/45777854083.pdfIn PDF document text
    • https://site-1177226.mozfiles.com/files/1177226/43350884085.pdfIn PDF document text
    • https://natagudere.weebly.com/uploads/1/3/4/5/134526504/vemoraviwema-mejunu-putelufaj.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/zekaxukazorunapew.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/negonanopix/43342566105.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/25029125419.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/41450115050.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_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 5488 bytes
SHA-256: 6f9398e843206a13fb90315504194360424a88e2153e278af6cd83120ac5a2d5
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 11308 bytes
SHA-256: 28bdbd538dbe9ef5e31440211c68ff709e136dad97b5f2f4e58e8b3ec9a9b61b

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