Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc2b86edae2fad9…

MALICIOUS

PDF

62.6 KB Created: 2020-12-03 10:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f9b1457b11454719abcbc2d9bc193c4a SHA-1: ef24821c154623cd9a169a60fb90af6a4f6bfdb6 SHA-256: dcc2b86edae2fad9bc3788b3956d6ef78cc6f2051e0600713ba176f58203c748
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=individualism+in+art+during+the+renaissance In PDF document text
    • https://wojasatog.weebly.com/uploads/1/3/4/7/134765175/jerag_dubibazuzafag_vagamad_zaxisixisem.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/3402108.pdfIn PDF document text
    • https://pisilobeko.weebly.com/uploads/1/3/4/7/134728547/1dfd63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a42438d6-099d-4ccc-ab08-b0fb173a59ac/96978023868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc412bf-0894-437d-8f9b-57e74c92259e/januzegimopejimidojora.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/xuduwix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79de8bd-4c35-4a69-95a6-c5155da87bdf/pixerobowuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff7acde-6e26-4c10-943c-43bdfbd47172/definicion_de_compras_segun_varios_autores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc506d2-774c-4c41-a1be-910e81d825bf/11346308521.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2bc6ebf71053ccb1bf174/t/5fc3d14e3570fb44d177b1db/1606668623891/joker_online_free_no_sign_up.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c769b1ed03538d14dfa/1606372471326/retrofoam_of_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dfb4754-d8b1-441a-9067-d6b13c9f2cfb/puzudif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07E 5124 bytes
SHA-256: 49b2120b65813459e0669f253b95f73223e46ca1a0279c66308f0a9a6f2cdf77
font_01_sfnt_off0000c1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A8 8804 bytes
SHA-256: 07b4c110886ca3eb8d33d07119dfc4cc2a005c00d07334d59d2f55104f8ce526
font_02_sfnt_off0000df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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