Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8574cca7e22dfc…

MALICIOUS

PDF

66.7 KB Created: 2020-11-13 10:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d7099b9eff259736ffd551241d9d4df SHA-1: 5530397436ced5d55613703098574e5efae836d4 SHA-256: 9f8574cca7e22dfcd3f91d0be8c5bed447e7b392899f69d94764ab4368d74b53
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external links, 'https://trafficel.ru/123?utm_term=brad+neely%2527s+harg+nallin%2527+sclopio+peepio', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through link farms.

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://trafficel.ru/123?utm_term=brad+neely%2527s+harg+nallin%2527+sclopio+peepio PDF link annotation
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/a0afa586e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5f9d8d6881475.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/bc31b4d3ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5f9e525be1779.pdfIn PDF document text
    • https://nulivoji.weebly.com/uploads/1/3/4/3/134343303/xisulalenojoruj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/651dcfdf-d782-4c22-8150-85dcfe441f34/fudam.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxibipan/8199551265.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/properties_of_axiomatic_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5983501-774a-421e-8bab-8df7d6f266e7/68470591443.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/born_in_fire_nora_roberts_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88967742-b72e-4945-abdd-94243d60ad4f/este_de_europa.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/calendario_2019_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/67612043280.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_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 5520 bytes
SHA-256: 2f9c2a74519f5dc791968938b122a287cbb63538d76b3af82b37ccc64ed715b2
font_01_sfnt_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 10696 bytes
SHA-256: f282c66aac5d7033cabdcadcab121427efc0d74a91497d89cbde24b3ce3f887a

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