Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a04b15352e1420…

MALICIOUS

PDF

80.5 KB Created: 2021-02-27 07:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6ab62c0b648cb56e9b90791b41fcade1 SHA-1: 8d632c6d4221e292524ea398597ce749b4218e78 SHA-256: d7a04b15352e14206017c1e540880278816c86c74c44268cb7eff6b82a52a78f
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a common tactic for phishing and SEO spam campaigns. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass external PDF link farm, suggesting the document's primary purpose is to redirect users to malicious or spam-related websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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/strik?utm_term=araby+james+joyce+plot+summary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491398/normal_5ff2d54f9a6ab.pdfIn PDF document text
    • http://mon-fortuneo.best/druid_handbook_4ew86tv.pdfIn PDF document text
    • https://muvusawit.weebly.com/uploads/1/3/5/3/135392745/povakipuwilubufuguka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_5fe6b3ea037d6.pdfIn PDF document text
    • http://kyukty68.xyz/21282877046llhyy.pdfIn PDF document text
    • http://mysteps.online/catalina_update_slow12c9v.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/petosabosepob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416672/normal_60047630db2e2.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/e17ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vufuzewasi/39226122153.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/bump_of_chicken_gekkou_single.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/devexpress_report_designer_license.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/diono_radian_3_rxt_forward_facing_recline.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/baxuwanunibame.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/xewexelaponofiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/87575708795.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/69149468113.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/28124874828.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 5112 bytes
SHA-256: 08829a4eabef940135c15829e94712eb88c4427d45247223bf83604e425d6cfe
font_01_sfnt_off00010194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 10976 bytes
SHA-256: 4680dbaa675cac32be26eb752a1befaeed63ebe92c35a6ed4fe83ef2d614f49f
font_02_sfnt_off000126a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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