Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbbf1a296de05d6…

MALICIOUS

PDF

67.6 KB Created: 2020-12-15 17:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cc6cd4cd8f8492b64d1ad47eafa79555 SHA-1: 16b852039b8b943219d90b57fd193fc1a1c23b1d SHA-256: 9bbbf1a296de05d606fc2fea5b8e6671238386289ba0f4197a3bb1b942f11632
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a non-standard use of PDFs for SEO manipulation or potentially distributing malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffi.ru/123?utm_term=cleaning+of+office+premises PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5f967529e7770.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/4004344.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/ponufo-furori-zipiwilu-duzodanogo.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/1495104.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/tapeja-kelew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f9256aa499fb.pdfIn PDF document text
    • https://jujijojof.weebly.com/uploads/1/3/4/3/134353579/8e006d5c286a84d.pdfIn PDF document text
    • https://fadexawotizetav.weebly.com/uploads/1/3/4/3/134339615/365891.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/28597b90a307d9.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/donukadizolin/best_to_word_converter_online_editable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0336649b-d146-49f4-a6ab-ba9f03f42260/92686054079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64fe4d99-1a99-47aa-b458-aee9b657b5d6/kutik.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/3865775417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e659182-b7e1-438b-b393-948b6b8e12ea/65518043528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dde7d57-436c-464a-9aeb-c4a54c44e83c/descargar_libro_de_sapos_a_principes_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8511e11b-ee1c-426f-b861-b3faa52a5632/pupesafaki.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_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 5240 bytes
SHA-256: 7f766eba641b1d6c7c1b29536e3150185b717c6f95e539eeaabc765f1b8e0484
font_01_sfnt_off0000de63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE63 10324 bytes
SHA-256: 7ec6719d0d680c65c1785f5f1db05bc273c1e0f28734187a7c71c3b786067779

Open this report in the interactive analyzer, or submit your own file for analysis.