Malicious PDF — malware analysis report

Static analysis result for SHA-256 760f5964557ed131…

MALICIOUS

PDF

75.3 KB Created: 2021-03-16 15:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00e5924163a31ad3c5befea93802624 SHA-1: d6158a805e2360eebd043b4205a539ae2da35642 SHA-256: 760f5964557ed131c67d233f1be2399cc1e99067115f1f6b1420f453dc81b911
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, with the primary URL being 'https://nipisod.ru/award?keyword=capture+one+pro+12+user+guide+pdf'. The presence of numerous links suggests a link farm or phishing attempt, aiming to direct users to potentially harmful content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://nipisod.ru/award?keyword=capture+one+pro+12+user+guide+pdf
    • https://dekukosozo.weebly.com/uploads/1/3/1/0/131070054/57af6c264fb0.pdf
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/jigonulosuwed.pdf
    • https://cdn.sqhk.co/tumupowe/gdHKujb/47854363418.pdf
    • https://cdn.sqhk.co/kososojog/ghbdUgj/50312831299.pdf
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/dexug.pdf
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5feafb8c3325f.pdf
    • https://cdn-cms.f-static.net/uploads/4492245/normal_60273fc9364a4.pdf
    • https://cdn-cms.f-static.net/uploads/4490953/normal_6037a09f02b8e.pdf
    • https://cdn.sqhk.co/vozeseseber/Sv0jhIi/74794262248.pdf
    • https://cdn-cms.f-static.net/uploads/4445338/normal_601ad7cdea928.pdf
    • https://cdn-cms.f-static.net/uploads/4460963/normal_6033fb4ad47cd.pdf
    • https://cdn.sqhk.co/lolatonuvesa/hcZhiij/micro_pig_tattoo.pdf
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/6b5d2df97c4d8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/17c037b8-a412-4aaa-a2ee-e295fb3111ed/deadpool_comic_books_marvel_database.pdf
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_ae8e4bd59e68491f9eee957695c38684.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a060b207-56b5-4c2b-b69b-b46f1d0d8cd3/what_is_the_point_of_waste_recycling_business.pdf
    • https://uploads.strikinglycdn.com/files/45d1db6a-53b6-4c3c-9634-0e2bf99e7f65/what_do_navy_officers_wear.pdf
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_188c6196cbfb44fcbb58485aec54ecde.pdf?index=true
    • http://xakifozosuj.epizy.com/31327832739.pdf
    • https://uploads.strikinglycdn.com/files/b1b1bfa7-76f2-44c2-80bc-6e3576191b1c/imovie_mac_tutorial_youtube.pdf
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_b89b4750a8654da68e4a551b9ac78361.pdf?index=true
    • https://uploads.strikinglycdn.com/files/155de178-b0b1-4302-9ad1-dcd7da6d0a85/23609399978.pdf
    • http://mujijebal.epizy.com/how_to_analyse_information_gathered.pdf
    • http://puzegekizizovin.epizy.com/definite_answer_synonym.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_off0000ea68.bin
26145ac8ddc0820742376718978a47bc8355077964eca9a32c40e7385fbb2353		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 5268 bytes
font_01_sfnt_off0000fc64.bin
eab1414493f5ba79a7943f83d539d47e78f4b3dd588e6a113944cf5c21e9029d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 10476 bytes

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