Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cd55c1e6817eda…

MALICIOUS

PDF

72.5 KB Created: 2021-02-13 22:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 15af7c9c0a014ad91c770e9c71358389 SHA-1: 2bde95179f03710f3cd30d2c50602deb31928443 SHA-256: 07cd55c1e6817eda83c83bb2e968910f66b03a26c84b4d6d9e3e3ce7ddc0ce9f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to lead 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://druttle.ru/wix?keyword=2005+sea+ray+owners+manual PDF link annotation
    • https://bopuxokefira.weebly.com/uploads/1/3/5/3/135300507/pepatafavava.pdfIn PDF document text
    • https://givepatodanino.weebly.com/uploads/1/3/6/0/136097232/7666483.pdfIn PDF document text
    • http://vnds-v.website/xulagekoramiluw1zolt.pdfIn PDF document text
    • http://tophomework.space/thomas_calculus_early_transcendentals_13th_edition_ebookgj8ie.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/nilelado.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/4ijlHhS/zombie_killer_attack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489411/normal_5fc6d519a0512.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/Kqhfxhh/air_hockey_table_pucks_and_pushers.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/viwavubaripomabanavl2qp8.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/varoximu/civilization_on_trial_toynbee.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/47736932847.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/ijazat_song_video_tinyjuke.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/19559416826.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/electrical_wire_size_calculator.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_off0000d402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD402 5328 bytes
SHA-256: c60f309012c8dc26217bce7ed6f89853a9bcda062136a090a2ef58c4acca51d1
font_01_sfnt_off0000e61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 14556 bytes
SHA-256: aa25d342a6d0a64cce639e25f3d7aade9620c3781c360087a6a1a0817e3ea1fa

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