Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae093c0aac982096…

MALICIOUS

PDF

84.1 KB Created: 2021-03-29 20:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9f5acaaad76b5c5a1010bb540644bb01 SHA-1: 56998a90e46677dd334c2a77e7b566e998fb8a3f SHA-256: ae093c0aac982096539ed5b318260e087779062c73902c36234074035e5b87b1
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors. The document body, though heavily obfuscated, suggests a lure related to tractor parts, likely to trick users into clicking these links. The presence of a malicious redirector link and the sheer volume of external links indicate a phishing or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=mahindra+tractor+spare+parts+catalogue+pdf In PDF document text
    • http://wejuveziwep.mypressonline.com/52851073325.pdfIn PDF document text
    • http://umkatrade.ru/1524402916ffuzy.pdfIn PDF document text
    • https://wibujiwegawej.weebly.com/uploads/1/3/4/8/134899761/xinobozuxiradozog.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/wuxulosalug.pdfIn PDF document text
    • https://poxomovuru.weebly.com/uploads/1/3/1/3/131381772/9c8bdbc3dc60c3.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/cephalocaudal_assessment.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/xemodelifuxesam.pdfIn PDF document text
    • http://reduslimitalia.site/how_to_use_my_dvr_on_xfinity6gnm5.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/dficit_en_antithrombine_3.pdfIn PDF document text
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/fevejixu_pojerexe_pefadexe_bemelikofiwa.pdfIn PDF document text
    • http://aycotoro5.xyz/76996853899tepif.pdfIn PDF document text
    • https://xowesujitevenas.weebly.com/uploads/1/3/5/3/135321640/vofeniwet.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/82361.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/gawewabinip-xonowizazemewur-vijusakuwavarib-jixurakabigon.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/46642e28-7f28-423f-aefa-c26611c632b0/lilaxibumabikovalofanu.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_309c3b82cd844d9dae7e48ea2266e7ec.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_c35dfdc95b67427680c2be6e07a1ba46.pdf?index=trueIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_4e667bc38ad14c12bb6286eae4a79fda.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2949b3da-7cc2-4148-9065-27d5c8f12469/how_to_set_up_blizzard_authenticator_serial_number.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_add1903b73144b448d5daddb9f116fab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/744b355a-3b2c-4f92-aedc-ceca54c436b9/junepapugimawibuzisitosi.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_338e4b8642ab4f4abea5d7b06885b19a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9584f50c-c4bc-4500-be4e-25573cf31a17/what_guys_like_to_hear.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 5424 bytes
SHA-256: bc0333321c13390d5813fa33f736eb173fbcbdd92fef3368911efd60e6fca0ac
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 12432 bytes
SHA-256: 5682ba8fb0a19063fac5b07e8087063fee1d941ea4d69ed1a82513aa49648276
font_02_sfnt_off00012b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7A 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e