Malicious PDF — malware analysis report

Static analysis result for SHA-256 632ff031717300ee…

MALICIOUS

PDF

65.2 KB Created: 2020-12-20 12:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d7e4e0265f5c0f4086b6956b1be677e1 SHA-1: 94aaf05f9cc03a84b99c24c30c64e08347012b67 SHA-256: 632ff031717300ee914165293d4c7e3caa61576e8aedf8e820fe09c78063230d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript or other exploit vectors to redirect users to malicious sites like 'https://traffking.ru/strik?utm_term=double+penetration+strapon'.

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://traffking.ru/strik?utm_term=double+penetration+strapon PDF link annotation
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/f5cf9a30f7047a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5f9172282babc.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/jurujupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_5fad10de1311e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5fd11cc3219ee.pdfIn PDF document text
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/taweriremavolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_5fcf2e1f08dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_5fb5df9fd9be2.pdfIn PDF document text
    • https://legobunisazej.weebly.com/uploads/1/3/4/5/134501617/jilarup.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/e41a12f67c.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/1004145.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/tuxutedi/technical_documentation_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/naferamataborinana.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/tenomodozozitibexujuwi.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_off0000c41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41B 4952 bytes
SHA-256: 827edecb1a0782fc25b6e5f36ab15f989936ec89a86f6748dee8a2d05d1101e2
font_01_sfnt_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 10312 bytes
SHA-256: a710deadf52419a8de6ec753dd1af4378844cffddb1691bb16ac2cab4a3e26e1