Malicious PDF — malware analysis report

Static analysis result for SHA-256 044afceb9300d568…

MALICIOUS

PDF

61.6 KB Created: 2020-11-24 03:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 77f84dd1b67ddc087dde174f9a1096d4 SHA-1: d864a1e67f5d4303bf4d6c3fa493eb716f836922 SHA-256: 044afceb9300d5685d6889b284cfffe0143a1f2312f9f9e32f88970ab39507f9
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 0.9996

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=ionic+bond+practice+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480893/normal_5fbbe14386564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_5fae7cb7671f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_5fa72b2a85938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5f9558a8628ec.pdfIn PDF document text
    • https://xusuzipurojovup.weebly.com/uploads/1/3/4/3/134325257/ebd96a338b1f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468531/normal_5fb7a59d7d385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491433/normal_5fafd694111b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fb9ba3a52860.pdfIn PDF document text
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/lotogetuv.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/wavukabimemope.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/c5a56992-a5bd-4591-a647-fe9e4859c3c6/bug_bounty_hunter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c5d248-3cbb-42ab-b417-08284a0350dd/evaluation_la_parure_4eme.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/44090462314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be27a37a-d33b-4b43-925c-c00c5ca5765e/61417735154.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_off0000b4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C0 5364 bytes
SHA-256: 1e09fb9d8a8235fe564b07a55d335ba52d48841b9b53db8385b69ef2c409d50a
font_01_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 10360 bytes
SHA-256: 9440244ce6b5ada7413fe5b1421a9b9ba84c7e40bdcee3c5b4b778ff55a50f76

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