Malicious PDF — malware analysis report

Static analysis result for SHA-256 29afabaa37f4a2ac…

MALICIOUS

PDF

106.4 KB Created: 2021-04-07 21:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7b8389706a0c73c941857544cb034e SHA-1: dc0a44d7a30bc3a987f69b9b0ccd851aca3f9e6a SHA-256: 29afabaa37f4a2ac05b57bb03334bd2a7fe6b2e133dc164bc0e779fd2444c5ee
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded external links, with a critical heuristic identifying it as a potential link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and a high number of PDF links suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=the+misfit+of+demon+king+academy+season+2+episode+1
    • http://arm-watch3.club/82973955093da59v.pdf
    • http://vas-rem.ru/remote_sensing_of_environment_jensendgqif.pdf
    • https://cdn.sqhk.co/pajijolabalu/ikyighe/piano_melody_maker_online.pdf
    • https://cdn.sqhk.co/torixugajo/kghpij3/vipudateluwirodabu.pdf
    • https://cdn.sqhk.co/zipodumup/hbsryTG/moto_z3_camera_not_working.pdf
    • http://zoompol.xyz/lip_art_makeup_ideasz3yld.pdf
    • https://cdn.sqhk.co/ganuniwiku/uRShjhc/jegefonasotikaw.pdf
    • https://cdn.sqhk.co/puwupasakej/cegcUMO/no_one_escapes_cidhna_mine_choice.pdf
    • http://lnstagram-verifedbadge.com/xovavoderizan75zl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_4204b1c65e7448fa813f1a0f5d695f56.pdf?index=true
    • https://uploads.strikinglycdn.com/files/19c0c5a0-2c26-422c-b2f6-d9919c810e58/dd_3.5_monster_finder.pdf
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_aefc80a5c2e44c8aaf78ab89476c7540.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a48a1a15-573b-4c51-a4ea-494c9b44a791/febadulixo.pdf
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_13f734f31e0549c7b52a0eeefa59d61c.pdf?index=true
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_4f915cf20c8040ac9caffcd536da2e9a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/65c5c2f7-6939-4dc6-88f1-ae90efd8e5c4/what_does_f21_mean_on_a_kenmore_washing_machine.pdf
    • https://uploads.strikinglycdn.com/files/0d3d6e11-d010-4b1f-96b5-177d871c034a/what_are_the_characteristics_of_a_righteous_man.pdf
    • https://uploads.strikinglycdn.com/files/be8b005a-66e3-49ac-8798-803c7a8075e2/zonirugu.pdf
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_3b45056bbd4f4b9aa4b153d49730372a.pdf?index=true
    • https://854397d5-242e-4836-9f1e-4d22a5541959.filesusr.com/ugd/88a329_9011e2aed73d4d538fdd5fde48c57dc8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b14ed46b-58e3-41a1-b4b0-e5891c801ae1/the_power_of_love_celine_dion.pdf
    • https://uploads.strikinglycdn.com/files/6726ca86-5b4a-4b8c-9a16-c24a0916697f/14257184101.pdf
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_650a1c1d507a40b89a139683f01ec17b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001102b.bin
eeac1e0692e86c5373d3e909edf990db67a7cf5843da66c833d5e05341cb68a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1102B 25500 bytes
font_01_sfnt_off0001610d.bin
641dd97741ddcd0f524fec4923350cf642c3221adafec477bea5e594b80c7deb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1610D 5740 bytes
font_02_sfnt_off00017487.bin
b188a9656b93ad86cdb496bdd20a306f0b3b4b4718f923a420ae483a7160f0dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17487 11724 bytes

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