Malicious PDF — malware analysis report

Static analysis result for SHA-256 972d927c96f615b7…

MALICIOUS

PDF

81.4 KB Created: 2021-03-21 07:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fd36a7b399cb9482e4eb9bcf45d5c030 SHA-1: e4a68fffd3183cecb28ee4ed71a22ee27467b1d6 SHA-256: 972d927c96f615b7426bb98c11d5c2513ff2d53bca3e7b5a73a91cf61a092fe9
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it's a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'pinch of nom pdf download', likely a lure to trick users into downloading malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/award?keyword=pinch+of+nom+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420434/normal_6051a1d2e44e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_602f75436e639.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/cVYQYjb/13873767758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_60413e20bfff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_604dae33d89b3.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/PDihjfi/bugsnax_release_date_uk.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/antigone_holt_mcdougal.pdfIn PDF document text
    • https://ligepakege.weebly.com/uploads/1/3/1/8/131871609/2884090.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/zepinu-bugugamerazamof.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/jBfBia4/89825691079.pdfIn PDF document text
    • https://cdn.sqhk.co/muwupajikaro/dmjbgh8/zidarojujodalodipi.pdfIn PDF document text
    • https://cdn.sqhk.co/wezokobuli/eifFial/zazagudodogep.pdfIn PDF document text
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/ce0088136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_6015a90b5ac53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462980/normal_5fe1bcef0b658.pdfIn PDF document text
    • https://sefoxobifi.weebly.com/uploads/1/3/6/0/136093232/misumug_pazovenini.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/talukosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5feda3b0a02cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412391/normal_5fee8dfa53ed5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujiwexamofone.rf.gd/lixugesovufofova.pdfIn PDF document text
    • http://xuvifovagorinuj.rf.gd/correlative_conjunctions_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/occupational_safety_and_health_act.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/dd_3.5_e_character_sheet_fillable.pdfIn PDF document text
    • http://gofudawaropuz.epizy.com/job_recommendation_letter_sample_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/awadhesh_premi_video_bewafa_ing.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_off0000f388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 5212 bytes
SHA-256: 466c7093d4d11efb21d1b38eb8417f0633a630f9a6ac1675dcdbc4eacfbc59da
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 2664 bytes
SHA-256: b46d01bab6bfd7427f757666437073f74d3496a57a809f1f332cbdc94a5d4bea
font_02_sfnt_off00011078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11078 11112 bytes
SHA-256: bf0c0dfcd56ffc97d449a73c3e3a33e6507bc1d8a5dbc807b2bf0eca8fdc7647