Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47a2e46452f17fe…

MALICIOUS

PDF

78.5 KB Created: 2021-03-21 11:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bb2a25e70bb9a3cb988476152fe0bab SHA-1: 715c84b638fedc85bc23d8ce1548a6272f6bd42d SHA-256: a47a2e46452f17fe4fb151bc2770ee8cd3b1954d09f51b3d06982a647923ac1d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'vilenefex.ru' with a 'how to fix' query suggests a phishing or social engineering lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates that the PDF is designed to host multiple links, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=how+to+fix+ipad+mini+home+button+not+working
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5fcd9972ae95e.pdf
    • https://cdn-cms.f-static.net/uploads/4497075/normal_6010603940432.pdf
    • http://degimogug.mypressonline.com/auditing_and_assurance_services_in_australia_5th_edition.pdf
    • http://mon-cmbretagne.com/zisoramekizobugadusiyp8uo.pdf
    • http://1pokypki.website/best_graphics_android_games_free6zykc.pdf
    • http://9gusevshop.website/dog_running_drawing_front_viewq7o45.pdf
    • https://cdn-cms.f-static.net/uploads/4378164/normal_603ef935abaa8.pdf
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/zupetenunopizapo.pdf
    • http://goproits.com/weken000d0.pdf
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/vavujaretot_lewunagurebev.pdf
    • http://trastqort.online/ledewokumitff08x.pdf
    • http://gebigulexejo.sportsontheweb.net/adj_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_1794f6e788734a0aaf5206fe0e83eacf.pdf?index=true
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_bc27a78180c548f0806cdcbcfce1345e.pdf?index=true
    • https://s3.amazonaws.com/tajimipojimo/buxiti.pdf
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_c5ea8b8a8bbc4b49892df8d07d3917d5.pdf?index=true
    • http://nijarigu.onlinewebshop.net/36443338926.pdf
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_a187092256764bfb8d0b264ef9d0f61a.pdf?index=true
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_aeab8b3122d746de86d9dd1145adc5a7.pdf?index=true
    • https://s3.amazonaws.com/lorerexeg/jepatikero.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/foods_to_avoid_for_gallbladder_inflammation.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_off0000f25a.bin
6b862acaf4e9f83f02cd1609eab9f93d23f8fa68077e5d3c5f686f8968126a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 5572 bytes
font_01_sfnt_off0001053a.bin
27262d5a66c78e7a422dcbc184307b5312fcd1a88cb330372b9584306bca708d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053A 11620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.