Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae12c2ad46a9c29…

MALICIOUS

PDF

91.1 KB Created: 2021-03-15 03:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ee3aaa4501a1244ba2a88f3e7ff4cec0 SHA-1: e8995386224c882d5da373c63f2dcb211fbeb941 SHA-256: cae12c2ad46a9c291b7dbf5ae74fefbbc34daeb22faf457cc3ad6578aba84672
206 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. The document contains a link farm with numerous external URLs, some of which are hosted on disposable domains, suggesting an effort to obscure the ultimate destination or spread malicious content. The presence of a callback lure heuristic further supports the conclusion that this document is designed to trick users into contacting malicious actors under the guise of support or billing issues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://botokaw.ru/strik?utm_term=yamaha+01v96i+manual+cz PDF link annotation
    • https://cdn.sqhk.co/supopareso/hyHhjSD/nasamudolozelereno.pdfIn PDF document text
    • http://lixuzixewufixib.66ghz.com/3_personajes_importantes_de_la_independencia_de_estados_unidos.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/hb5M5jg/t-_rex_runner_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/EhhguB3/pisabuserixexibipuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/fTtRmOx/dowuxapilepebojiwuva.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/jjc7iap/white_triple_s_sneakers.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_a755fa18a8bf47a9aeddd06b40989920.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_71fa3e3aa35e45e490b61a519e207830.pdf?index=trueIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_eb81e69a99f040648e5be9bfccc3c9de.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_5d9ffd58bafc46c0aea53523235bd08f.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_90a9015993f740cbaabcb90a2380ee79.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_f681c825cd28480c83af9a3da6f71efe.pdf?index=trueIn PDF document text
    • http://vuzajakexe.epizy.com/88431288032.pdfIn PDF document text
    • http://zokitidekav.epizy.com/video_editor_apk_latest_version.pdfIn PDF document text
    • http://kazigolukujo.epizy.com/detective_conan_opening_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a6e879-c263-4a9b-985b-b91e8260e514/what_is_difference_between_nozzle_and_diffuser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b1706f-75d3-4de8-8ae8-dc38b02aa275/how_can_i_select_channels_in_airtel_dish_tv.pdfIn PDF document text
    • http://gesipimo.rf.gd/58247914248.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_22d095add71c4b03ada846507eed4a2e.pdf?index=trueIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_a05a1f7ec1aa47a1b28913ad3553f0df.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 1864 bytes
SHA-256: 119a870165a173a028fa0d2cba06bdab8a5a624f7bcd28180ef345da3dfb8877
font_01_sfnt_off00010c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C41 5340 bytes
SHA-256: 4f5cdceb0e5afc55058fa2f511e7bb54d736298f5c4edc49b9b069aaad4c7177
font_02_sfnt_off00011e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E60 12712 bytes
SHA-256: 03e7ceba7aba60e7ef5680b46eadb2397e93833927f1c3f0aecf99f39e697094
font_03_sfnt_off00014808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14808 16192 bytes
SHA-256: b168039b654f979c140925a464ef75142322e9f7cc9a166e601b7839e62a3bff

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