Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee16936216271749…

MALICIOUS

PDF

108.4 KB Created: 2021-05-18 13:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ea3fd8328526110a1296d096cf88ba SHA-1: d56d74ccbf850016d05096f16ea4ef342ff30279 SHA-256: ee16936216271749726c229a57f07ad1f2a2bf7475c61a69f23bf54da8cf5ba2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=menschen+a1.2+kursbuch+pdf+%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF
    • https://cdn-cms.f-static.net/uploads/4486213/normal_60618bbff3b52.pdf
    • https://cdn-cms.f-static.net/uploads/4408703/normal_60600296d7edb.pdf
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/vagimusuravosu_bejare_vekiwatofej_selakibaja.pdf
    • https://cdn-cms.f-static.net/uploads/4458407/normal_602f305483b0e.pdf
    • https://duweliga.weebly.com/uploads/1/3/4/5/134593675/rekokiwisulubilewotu.pdf
    • https://cdn-cms.f-static.net/uploads/4490116/normal_602e4e8d58e68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03b53350-623b-4488-92ca-306b8ecf5e53/varezejedomibubowonur.pdf
    • https://uploads.strikinglycdn.com/files/e2ae66f5-1179-48e7-a8b2-8f0b9e8ab802/riposiji.pdf
    • https://s3.amazonaws.com/mexavofezoxi/tepujonowubinidenokogopux.pdf
    • https://uploads.strikinglycdn.com/files/c3f9720a-4fd0-41f5-a740-e2bc464462c3/37760468393.pdf
    • https://uploads.strikinglycdn.com/files/95c32bb6-ccf5-4c4d-bdc8-9e08cd71c718/extraordinary_popular_delusions_and_the_madness_of_crowds_charles_mackay.pdf
    • https://uploads.strikinglycdn.com/files/65485297-fd8f-424d-8986-b6627b09aa56/12356686567.pdf
    • https://uploads.strikinglycdn.com/files/401984de-c9d4-4951-b53b-5e1bdcdb7ac2/how_often_should_vw_polo_be_serviced.pdf
    • http://wigewedarigal.rf.gd/80840430377.pdf
    • http://legabukev.epizy.com/brazing_welding_process.pdf
    • https://uploads.strikinglycdn.com/files/eb577bd5-b87a-4180-b3ed-e86350bdc1e8/sojedebikofobi.pdf
    • http://kusilip.epizy.com/74218745269.pdf
    • https://s3.amazonaws.com/lorifumofelu/bavokase.pdf
    • https://uploads.strikinglycdn.com/files/dc9d10e3-4301-4d9e-97c2-c26e5463856f/8206720957.pdf
    • https://uploads.strikinglycdn.com/files/67768f12-a0e2-4f2d-b0f0-903f16ddda9d/munapaduduwana.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016f58.bin
f094fb5d60cf2625338a803a5fa69dcdd7863d6c2ceb37491c97ee4e6884c049		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16F58 28348 bytes
font_00_sfnt_off00012348.bin
1a5e4a41f1b75d6d6b9132b84bd0b97959b989676059c73ae278c8b0dad96323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12348 5636 bytes
font_01_sfnt_off00013685.bin
2862bd26df44f790743c07279c997123bc03b3841ca0402cc2aea83bd3c5a1f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13685 9860 bytes
font_02_sfnt_off000158ab.bin
69a730b8487052aa41eabefbd7e0df7cb2f9e0b27ea8499d5fe592cc541ae512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158AB 16496 bytes

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