Malicious PDF — malware analysis report

Static analysis result for SHA-256 2163db422bf41823…

MALICIOUS

PDF

63.8 KB Created: 2020-12-30 07:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: baacb4f0748a4f28c268272de135c9e0 SHA-1: 9bbfa2199a095ded6a299e71870d7728e30223ac SHA-256: 2163db422bf41823893fa16700286c7a961456c030e6bed9b6bc34c402083e15
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://trafffe.ru/123?utm_term=caterpillar+3406+parts+manual PDF link annotation
    • https://pederojelukeb.weebly.com/uploads/1/3/4/8/134859697/eccad8ac7602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_5fe9c3dd9c1fa.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/che55gc/sfx_resorts_diamond_rewards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5f96c3971326c.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/8I5vjdP/bowixiradefovawizowetam.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/71b43877-7754-4d3e-b81c-c3d30de0adf0/fevedizozumobebil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a65c96-93b9-42d1-a070-f1bfbcb43a2b/romeo_and_juliet_act_3_quiz_multiple_choice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ada4ca-8406-49c0-b0d4-6d5900b7e809/4958049738.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/88072063484.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/joseluvevoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bac5a38-62f2-4fbe-8782-f1c58c7c292a/wilipeweremapilug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f332852-b5db-4fe5-939f-ff54be33d242/romeradure.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/album_songs_free_hd_video.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 7

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_off0000bbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCD 5416 bytes
SHA-256: 1cd5844ccf84a978402ecd5a2e544598ffc4790002a8bda85890b774d015be4a
font_01_sfnt_off0000ce1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1F 10536 bytes
SHA-256: fa23ea6659531903074c1ddcbcc493335f366d707d677184d62296b5b8e62bd9

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