Malicious PDF — malware analysis report

Static analysis result for SHA-256 09276b9ada5c752c…

MALICIOUS

PDF

65.7 KB Created: 2020-11-11 16:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e20a18a3317d9f648080395c57b04008 SHA-1: dccb3e96cd412398856f6d1dac54fc86d6b6afe0 SHA-256: 09276b9ada5c752cbcba1d4fba3893fbcacd509b8a38c5d585c827708644d77c
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://trafftec.ru/123?utm_term=lexile+score+chart+for+8th+grade PDF link annotation
    • https://nifadajenekipib.weebly.com/uploads/1/3/4/3/134305148/bixonajavarikabawa.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/86a931f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f8fb80685b65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_5faaf4bb54e0d.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/retobifulipo/sikemoxowatufusumerix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a38c64a-b8e9-4fd7-9868-d0b62c432507/phylogenetic_tree_pogil_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef0322-13ce-4617-873b-d8e0a28b58f8/whole_foods_mission_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ee36639-283d-43bc-8940-5a59ab7249b2/64844922430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef93a515-119c-424a-b247-cd6cdc085513/16443944951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadf93af-ed46-4c74-91f8-fd84f26ebfa8/jenetijupituwabuniko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5629a374-c01a-4d5e-bd22-54f8b9da09d0/13021911098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05d5bad-19e8-44de-a34a-c47e6167f3ba/72120596994.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/6330204927.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/katujimux.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_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 5484 bytes
SHA-256: 442d1558c762bdb3d00d68bbf92b095eba8a9ac033c571b1fcfa453509fa4e19
font_01_sfnt_off0000d653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD653 10352 bytes
SHA-256: db85e1ab1cf68119cb6e508ac6986cb9a4bcae2d68f4a3af8599df433e873577

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