Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d13432982151ad7…

MALICIOUS

PDF

62.6 KB Created: 2020-12-19 01:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f7815d1a35798d86cb8e8d4fadfa7aea SHA-1: 194bff28835b41b6725ef29d28e9b517f35208cf SHA-256: 6d13432982151ad7c34b343076345c09d8bc765555f87d2df9287a0719e79464
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to known malicious infrastructure. This strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file. No scripts were extracted, but the presence of malicious links is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=aldrich+and+james+rooftops In PDF document text
    • https://lafefozusut.weebly.com/uploads/1/3/4/5/134597047/4164144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5fbb30ef8fd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd9ae254e1f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474222/normal_5fb85e0718fcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc906ea41727.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/3888180.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/pazifetanegapu/fesojesirivimunud.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/video_ogunmola_bashorun_ibadan_part_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10dd611f6a419848684c6/t/5fc13d2dcb3e0f57717ca0bc/1606499629964/ruth_younger_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/jejowegagasuvogi.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/rate_my_vacation.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/bibosefob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcefe61491241adc444dd5/1606217704289/omicron_gamma_omega_psi_phi.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/16x20_shed_plans_free.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_off0000b095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB095 5460 bytes
SHA-256: 6db25dd1058ced8f8da34206ff08a6cc1e39f03f290300d2ff70ede618ed0b3b
font_01_sfnt_off0000c303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC303 13932 bytes
SHA-256: c60e3cd1e75d2c90e100da99b6713c52355191db94988923094a306c9b66ec6b

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