Malicious PDF — malware analysis report

Static analysis result for SHA-256 329678c552c2a35b…

MALICIOUS

PDF

77.0 KB Created: 2021-03-07 06:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27c457520dd8007b8ee1b189970c74c SHA-1: 2a46f166c69b7b1963e57331378da032933d90dc SHA-256: 329678c552c2a35b720ce874f20c48ea334baa1ad1a33c06b483472218e2e8b7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. One of the primary URLs, 'https://jumiwimov.ru/wix?keyword=wiseguy+voice+download', is directly associated with the malicious verdict. The ML classifier and ClamAV also strongly indicate maliciousness, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure and heuristics point towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=wiseguy+voice+download
    • https://cdn.sqhk.co/vagekoxes/6gcciag/mofogogiwumo.pdf
    • https://cdn.sqhk.co/vefasebo/NjghiNI/fonavawuwifof.pdf
    • https://fejoburu.weebly.com/uploads/1/3/0/8/130813906/losewebodupat.pdf
    • https://cdn.sqhk.co/moturalogupe/NWnu9gh/tuzanafuxejeduriwabot.pdf
    • https://kipujoguburaza.weebly.com/uploads/1/3/4/3/134321983/zolidawekebor_dukibe.pdf
    • https://kifakofaw.weebly.com/uploads/1/3/4/0/134016777/tiguluvewavugom-tesipezuwo.pdf
    • https://cdn.sqhk.co/jinubodilev/jAxjghc/gomawefajovipuvu.pdf
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/4302967.pdf
    • https://wowererifawop.weebly.com/uploads/1/3/1/3/131384429/25d60c3.pdf
    • https://cdn.sqhk.co/tuwesedujila/i1jgnRA/notification_tones_for_whatsapp_mp3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zakuvusebaj.epizy.com/32784075179.pdf
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_8ef3de5742474cc79cd5f6cde37fd72a.pdf?index=true
    • https://e9155d39-0f7d-4366-9ee8-34e17fe3d773.filesusr.com/ugd/9e05b8_5b2da99e3fb8497682aee877e8cf2105.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_91beee11c0674daf8119cd3112d6f360.pdf?index=true
    • http://nujexaraxeb.epizy.com/amapiano_music_videos_mp4.pdf
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_727fd7dd32af40e387bd7c1d2342361a.pdf?index=true
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_dbad6b3023d942d38cba3741ba6319a5.pdf?index=true
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_b12d7f50fa084676ab45ebf479a1dcf8.pdf?index=true
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_d5064d044f1745dd81b65110241d1f2c.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_abd784e11352450fb2d636a81c39e34c.pdf?index=true
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_bef375bf2e6e4a2c94119628fd0d84d6.pdf?index=true
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_de03b1cf98d444859a8942fe52605b95.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_e5dece4bb1a24ab2878f47006ec91814.pdf?index=true
    • http://nazewomufewe.rf.gd/the_stand_2020_where_to_watch_in_canada.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee06.bin
e3ac412aa7949809fdfe176f73a0701402599b250063031c57f4d3a088bd1828		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5276 bytes
font_01_sfnt_off00010033.bin
a2413f847569d96867e7fab61c5ca5d52239829d974a3c143e650cf4d98fc7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 11424 bytes

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