Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4f906ede614e08…

MALICIOUS

PDF

77.2 KB Created: 2021-04-26 00:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4bfd596227f1b5a2082eec8e17602565 SHA-1: 0da68f7f28632557f868955ab591c22e8f439e46 SHA-256: 8e4f906ede614e08de88460eae6eb9670b2efefe7df653fff6e3580a2f73778a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs observed is https://xezojetit.ru/strik?utm_term=fiddler+on+the+roof+sabbath+prayer+song+lyrics, which is likely intended to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, but the presence of numerous external links and the high ML score indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=fiddler+on+the+roof+sabbath+prayer+song+lyrics PDF link annotation
    • https://cdn.sqhk.co/libuzewis/hGihaEd/alarm_clock_app_won_t_play_music.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/a7b2adcf82e9b.pdfIn PDF document text
    • http://japuxikuwef.iblogger.org/33984826242.pdfIn PDF document text
    • https://vukuxonujifated.weebly.com/uploads/1/3/1/1/131164545/fitaziwifefepum.pdfIn PDF document text
    • https://lenukanaferu.weebly.com/uploads/1/3/0/8/130873899/malufosaxo.pdfIn PDF document text
    • https://sutuvawubu.weebly.com/uploads/1/3/6/0/136055635/xobejutuzenigir.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/39134159861.pdfIn PDF document text
    • http://kubifadim.iblogger.org/83924170094.pdfIn PDF document text
    • http://linikewi.iblogger.org/how_the_grinch_stole_christmas_poem_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/S9vhc7M/electric_razor_prank_hair_trimmer_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hbjXqUj/fiwitovesakaduruvowomoso.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/fleeting_thought_meaning_in_telugu.pdfIn PDF document text
    • https://bomikuwutivibi.weebly.com/uploads/1/3/4/5/134598741/moneri-vufixin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://betizig.epizy.com/clash_of_clans_pc_no_bluestacks.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_c73d9167ccab46f2bda4634601a87fe9.pdf?index=trueIn PDF document text
    • http://jusopuzirefil.rf.gd/fogexob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ceb56b-9efc-4cb6-bc27-cb2825293792/doladuji.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_590c69dd48884463a2153e484da18346.pdf?index=trueIn PDF document text
    • https://b3159766-6c8b-4733-a97d-e59ef6783693.filesusr.com/ugd/21851e_574a453ddbd34229a67b293d81515be4.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_16077a8aae184492aa566c3630bbeb2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f2683e-1cb8-4a75-9939-ab8272b4c1d2/toto_washlet_installation_instructions.pdfIn PDF document text
    • https://6d1a2d78-ebd2-4140-94a0-411197be5b5f.filesusr.com/ugd/88ff89_d37469b0e2e94a18af0046d145d27192.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7518c0a-c23d-48e3-8829-a8fd14f58a94/star_trek_discovery_season_3_episode_7_spoilers.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_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 5616 bytes
SHA-256: d641ba1df9a1a7275c9abfe78e3d788de8c709d21464e2234a3a45377ad39bdf
font_01_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 10880 bytes
SHA-256: 093f38d742dde019f0a615a69c0cbe6cf93d6335edb3bdf803730a5ec363e5f7

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