Malicious PDF — malware analysis report

Static analysis result for SHA-256 71561f9e1d629857…

MALICIOUS

PDF

77.5 KB Created: 2021-01-03 14:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e06f3ff395dc92eaa82343d53aeccc5f SHA-1: 11d168d918d4a5a4d92f7e7dd3abb4e07c22941a SHA-256: 71561f9e1d6298570392dfe0b1ed733281cc1ce13d6c4f2675bf80bcbaf8cee0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic firing for 'PDF_SEO_LINK_FARM'. One of the primary URLs points to 'trafftec.ru' and is associated with 'cloudera certification dumps pdf', suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=cloudera+certification+dumps+pdf PDF link annotation
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/somuga.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/c6373dde-e924-4d6d-ade8-332d92815ccf/zujova.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/guidelines_for_antiplatelet_and_fibrinolytic_therapy_acls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7bd912-29af-4a3c-8519-30d6a52f5c0b/electron_configuration_webquest_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/agnathavasi_full_movie_telugu_movierulz.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/xaxizedefedaremusixaxok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6271a6-607e-4ecb-b367-e250976508f9/jibovufa.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/vizego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c72f4ce-2e41-4407-9a01-ee5c8e8b120c/gaxijofupot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c2e883-713d-4f11-807f-756d3035d3ba/japanese_jewellery_boxes_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b076fae-3c6f-41f8-a0c5-14d119c3205c/rukupopujowuxixaruwito.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 3

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_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 5208 bytes
SHA-256: 31aab1d821ed28e38dd4ab10a989c0689dfb7f15cc36dc5c4d46316a89f4e473
font_01_sfnt_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 11592 bytes
SHA-256: a8498daf833e608987945a0b3836208cee289d42db8049808439c27874034dae
font_02_sfnt_off00011af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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