Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2055de1306841ad…

MALICIOUS

PDF

76.7 KB Created: 2021-02-22 05:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bda128add1223d104a8db99ef024e46f SHA-1: ee7f40193e2d12f1ba9a68cb5c5f32ccd106e51f SHA-256: a2055de1306841ad76b4baf1b4dee09e6a7f2b59b795cbb2463174f1983aa802
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to compromised or malicious sites.

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/123?utm_term=half+blood+prince+potions+book+replica PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488572/normal_5fe80f1aa4c43.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/1fc28f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5ff763ea0eb61.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/WiaO1jf/71571839715.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481423/normal_600624a56a181.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/e2hgOF1/nuevo_pase_elite_free_fire_septiembre_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/gdgcGuC/gold_rush_3d_guide_to_pot_investing.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/iaLk7DV/lutokonozivonoronuve.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/b647d64e50.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/dezatazaluvaza_mulixojawufa_zeravon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5fef80b7024db.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/desekusoxi/what_does_collateral_estoppel_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/21472542044.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/birthday_cards_for_girlfriend_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/30983045883.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_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 5316 bytes
SHA-256: 14ac32bbf470b655c073ade6b458248487e70ed626b710f39b456e9757b7185c
font_01_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 11708 bytes
SHA-256: bcd5a8c5d80a2b68ab320be30ed03fe9a9d537d1861c0d56515ce401546539b9

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