Malicious PDF — malware analysis report

Static analysis result for SHA-256 703da19d2ef812b0…

MALICIOUS

PDF

71.7 KB Created: 2021-04-30 17:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e277d1bafd142bbb800cc457cdf48569 SHA-1: 6715e911e0def40e068fe85ab26cf38c8df5154d SHA-256: 703da19d2ef812b02206cc4e48c4629d6c33c1a7ce3275e52099332d4c23d680
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=kenneth+cole+watch+battery+chart PDF link annotation
    • http://goodsfor.life/tuition_reimbursement_letter_template6uxe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_604a98a711493.pdfIn PDF document text
    • http://thrivewebs.com/12287888043cuz37.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/gjigjdR/decline_mountain_climbers_benefits.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_602664d5b94b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5fcc2c520f010.pdfIn PDF document text
    • http://souve.me/tester_regulateur_pression_pompe_hpkfmta.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/wbLJAgg/71647508606.pdfIn PDF document text
    • http://yewes.space/runimonorupujelive15rmz.pdfIn PDF document text
    • http://compte-cmbretagne.best/kadupivu4t8z7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5ff97d2249ec4.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/jafhcvm/woxewifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fd651b80792d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdc4846-8911-4fab-ba82-932e57fb335e/do_bowflex_power_rods_wear_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79468388-98e3-4802-b7d4-a347a9ea7d7e/29374103000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277ab12d-9d3f-4437-8c81-a06983fef475/zoris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2f27f1-00e7-479c-ac5e-764be9e619cb/how_to_turn_on_garmin_s60.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcfa2127-61dd-4f7b-b0a8-76fde35cc0b3/42477570958.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_c8b9352daa8e4f869081537c148d5f01.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_4e17fec843844009b726ef4cb24d03c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78011932-58ab-4439-a3a9-d37c384ff4f5/lenovo_smart_band_app_for_iphone.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_off0000da6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 5012 bytes
SHA-256: 076a6d0123de7137dbd9e7f0506f4d32d338075306b8436d21c38c23793560fa
font_01_sfnt_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 10984 bytes
SHA-256: d8f587721d0ac5664e09ddb104bd6faeee5830240527f6549ea23eb205766193

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