Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30ca1e89d6e647e…

MALICIOUS

PDF

64.7 KB Created: 2021-02-13 20:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0ace29553c466c4c16d0b683c8b3097c SHA-1: cc765ab9b563c5df6d55d6b82db9e6d4630d72c5 SHA-256: a30ca1e89d6e647e4eca85b9b5468b390e8a4a9d31927a3cd96a2ac0b0c1b9e6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a site that appears to be part of a link farm. ClamAV detected the file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded content, though heavily obfuscated, suggests an attempt to direct users to external resources, aligning with phishing or malicious redirection tactics.

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://baarspo.ru/wb?keyword=dutch%20angel%20dragon%20ref%20sheet%20free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408190/normal_5fcb34e974557.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/DFgg5dE/45107790755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_601b39b7d3c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_6017c066e6c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_601fa90be803f.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/9686981.pdfIn PDF document text
    • https://gumakini.weebly.com/uploads/1/3/1/4/131414358/pepelozovokikenak.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/hbPaWyi/dijutatekage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_600537db10eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_6014f19aad997.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/senodiw/femox.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/bhartacha_ghatnakar_original_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/1999_jeep_cherokee_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/aadhar_card_ka_form_bharna.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_off0000c171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC171 5280 bytes
SHA-256: e36e8690bf448fd0d57b71f47ce979f3c6695782bd14ab8a642a3c99d8e38aa3
font_01_sfnt_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 10072 bytes
SHA-256: cc058942047ea1bd0a33fbe116e5c2ac609c904c62c4714050f9d39f0b719755

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