Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ffef2993464719…

MALICIOUS

PDF

81.9 KB Created: 2021-05-18 19:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03a73825b149b11ad866324ac6183727 SHA-1: 6eb06646ec036e08e21715296766e8043940948c SHA-256: 24ffef2993464719a4641675e85176d46b31982a34fad45666501749ff06e618
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to link farms, suggesting an attempt to obscure the final malicious destination. The document body, though partially corrupted, appears to be a lure related to financial investments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://cdn-cms.f-static.net/uploads/4487662/normal_604e074ce3675.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_602e6e19a00fb.pdfIn PDF document text
    • https://vuzizakepavojen.weebly.com/uploads/1/3/1/4/131484090/8fbf7ce2920b.pdfIn PDF document text
    • http://kanobukomovis.iblogger.org/jifupenuduban.pdfIn PDF document text
    • http://jotipire.iblogger.org/extracorporeal_life_support_organization_guidelines.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/a5ff91f837fac5c.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/ffd1693bc22.pdfIn PDF document text
    • http://joxotowefi.iblogger.org/57249267860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_60344dc0eec6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_600dcd9f0715f.pdfIn PDF document text
    • https://benezome.weebly.com/uploads/1/3/5/4/135400217/sijiwitoteduxisoropa.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/a0239714b74be46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379034/normal_60004de12cc35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=is%20garmin%20a%20good%20investmentPDF link annotation
    • https://uploads.strikinglycdn.com/files/2e35a30f-6469-4197-b975-8e5760f84a22/64826244154.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/fugejedawuga.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/foposubamenonujakixutenud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0a4508-de8e-4c98-b93c-cba76a8621b4/dream_meaning_of_seeing_apple_juice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7dbfc6-06f3-4f66-ba2e-c9339165f953/74016570350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357449a0-ed05-415f-ab54-dca09faa927c/35468202934.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/american_journey_dog_food_sold_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/balance_druid_leveling_guide_classic.pdfIn PDF document text
    • http://datanovetojerub.rf.gd/come_on_eileen_sheet_music.pdfIn PDF document text
    • http://suxorodefis.epizy.com/wopawulogewuvarala.pdfIn PDF document text
    • http://womutefipile.epizy.com/xakozilopurenipowudato.pdfIn PDF document text
    • http://wetavirevamo.epizy.com/20789523765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5632a917-44ea-41e1-861d-48e8a1b37668/11771820770.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_off00010355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10355 5108 bytes
SHA-256: 83e10d97ca0eb5e053044623684b598a5ee713cdc57b06cfc8e7e39afd6b8bfe
font_01_sfnt_off000114a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A3 11200 bytes
SHA-256: 68897316cf6ffca61e950c5180e5c49926fb9ca2fbcb5bd380487d011cc323c8