Malicious PDF — malware analysis report

Static analysis result for SHA-256 56686493f60b0bb1…

MALICIOUS

PDF

67.8 KB Created: 2020-11-13 08:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7818092d9f2178544f892ef6963800f3 SHA-1: 5b5b8f0d405d13c1d08192150fab8522947a99fd SHA-256: 56686493f60b0bb16621b481a23eae4c0b5407ec20d8e6c9b28026e1b8ac9d10
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/aws?utm_term=fox+32+sports+reporters PDF link annotation
    • https://wafodefa.weebly.com/uploads/1/3/4/4/134480145/a909844e.pdfIn PDF document text
    • https://fevijalefo.weebly.com/uploads/1/3/4/3/134383315/gupevif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_5fa0b9d33ebb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5faaf3702e331.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/394691e6-c1d3-4e57-be77-baa81324edb6/92502199955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ab64ec-7a66-495f-8db5-d70e36403c83/tulokifil.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/68019424956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51d76cb-010e-4ea8-8a51-f86272a871a9/atividades_pronomes_pessoais_ingles_6o_ano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab313a90-4f28-420f-92c8-af96ee946574/9345908986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de927d3-ae80-4529-8bc8-5c7de6df93b9/path_of_exile_prophecy_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/45987893482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23fc8c4-0605-4964-814f-b66b81b0cecf/12594373272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad17cf6-d6f2-4665-b67f-42be5d9f5b15/25364622639.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/nunaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0878dcd-6a69-4491-a7b7-e880750ad129/freedom_1.0.6_apk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD66 4892 bytes
SHA-256: 94a07b894d3e4fc6e2e93fde6b906b1dc5e1a9700088fc51188fe6b1d7302389
font_01_sfnt_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 10748 bytes
SHA-256: 3b198a08b3f30bf5ac503f61619927d49eba8c88eb09bffc4c00775f0bc37d4f

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