Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f089ff904b9eeb7…

MALICIOUS

PDF

90.8 KB Created: 2021-03-14 12:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a5c2c6d0139fb6a16e24b29769a465f9 SHA-1: d7f642d111fbf147525a304162b274a388f33564 SHA-256: 0f089ff904b9eeb78840377b16763edee286887b79697097bbd139ce1890d5a8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a PDF link farm. The primary malicious URL, 'https://dafemum.ru/wix?keyword=what+is+the+ffa+mission+statement+what+page+is+this+found+on', is flagged as a malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=what+is+the+ffa+mission+statement+what+page+is+this+found+on In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_6018c8a125f9d.pdfIn PDF document text
    • http://zimefob.22web.org/nozizunorozif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5fd3c1b37011b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_60256e2f4e32b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_5fd71a70a0bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_60410234dd1eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_b07b1d27f7e74007a7d00df5c23cc866.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_a757532f528241d2bfd31e985e4231c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/push_power_protect_sony_mhc-dx3.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/boolean_algebra_in_computer_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/medieval_2_total_war_game_of_thrones_mod.pdfIn PDF document text
    • http://kisuvixoj.epizy.com/32703791570.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/7049978141.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/70158209139.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_0835cef319854f508e9b70631a7d00ef.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_63edf0ad7dd44bd7b6a5146e47fbea0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefagolom/affinity_designer_ipad_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C8 5316 bytes
SHA-256: 872ad538020f3f7d05948030c5c482304848a10dd959bbcca4d3d3537f80f3b0
font_01_sfnt_off000128d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D6 11384 bytes
SHA-256: f9bacf0486be6e0105a26c503dc85e074e4f00426c042ec7b07d98e33ff66ce6
font_02_sfnt_off00014f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F94 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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