Malicious PDF — malware analysis report

Static analysis result for SHA-256 547edb21d70ecef5…

MALICIOUS

PDF

73.7 KB Created: 2021-04-01 10:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7255aa2e51871735c01e19c1c51c6069 SHA-1: da673e6105e608665fd7193c23eb9c30b2805399 SHA-256: 547edb21d70ecef595c22597a6c06e3cabe6c3cec84b1616ae92d7a723c31c69
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDFs, suggesting a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites or download further payloads.

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://ponafet.ru/wix?keyword=bill+nye+pressure+video+worksheet+answers PDF link annotation
    • http://luminar2-download.xyz/what_is_dork_diaries_1_about83suh.pdfIn PDF document text
    • http://okstore.info/boardworks_enzymes_worksheet9q20a.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/iRmhfgd/kenejuxeluzoxolodimizose.pdfIn PDF document text
    • http://trenketo.buzz/22939537011ser6s.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/ejgYOjf/cooking_festival_rune_factory_4.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/jL7haug/puvajemasotezofufuxok.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/hifc5g5/gopeneposuvebolodad.pdfIn PDF document text
    • http://lastmarkt.ru/perlas_escondidas_jeremias_8_11oy7jo.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/puzuna40a39.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/jivuxo/nabuwinanu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/57668639448.pdfIn PDF document text
    • http://satovatusewonaw.rf.gd/acrobat_editor_free_trial.pdfIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_009b2b0e4c5e449bb7608c8c56ca253e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tudawufed/drilled_shaft_design_and_construction_guidelines_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/75831787813.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/wovinet.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_8d0b513d4dfd4c718d5b3b0455a995a1.pdf?index=trueIn PDF document text
    • http://bideliv.rf.gd/snapple_harvard_business_case.pdfIn PDF document text
    • https://404c0e03-56c4-4888-bb84-d9d32a71a3e4.filesusr.com/ugd/100e2e_0cc4bb040ed04cd78435e0432449f166.pdf?index=trueIn 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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 5412 bytes
SHA-256: 4e68ad7714714de1f8f654338cab24d49d541c62d307477f366d4aec7fae1385
font_01_sfnt_off0000f50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 10816 bytes
SHA-256: 631125aa9f006c6ef2e8255c0057f87816841af1f2fb76f76652ae997f8b5013

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