Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1112fea6c8484c…

MALICIOUS

PDF

79.6 KB Created: 2021-06-13 15:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06bcd97bd7dd981b4c7b35a0a9dd3bd SHA-1: e5ae06ea7e208f6eca5de0f3efcf29308680eedd SHA-256: fa1112fea6c8484c56e3d97a8cd1ef7c3ff19b54eb51273ec77645797b5ebaad
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious lure designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://laborke.ru/pbw?utm_term=transformers+the+last+knight+480p
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/1680641.pdf
    • https://cdn-cms.f-static.net/uploads/4448744/normal_60111f5840734.pdf
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/pediwuwugumenof.pdf
    • https://govuxedosuwiwur.weebly.com/uploads/1/3/5/9/135962540/mejokigemubupuvavov.pdf
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/5407157.pdf
    • https://wilexezixokesu.weebly.com/uploads/1/3/4/7/134764798/0c8b13913f7007e.pdf
    • https://cdn-cms.f-static.net/uploads/4462035/normal_60c388c064dd0.pdf
    • https://gupifamerimim.weebly.com/uploads/1/3/4/1/134132082/fe2aeabe6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xalanupuzewo.pbworks.com/f/illustrators_guidebook_free_download.pdf
    • https://uploads.strikinglycdn.com/files/5a8648d1-d616-4ca7-9de0-46a7e274ff42/download_transformers_revenge_of_the_fallen_game_for_pc_full_version_free_compressed.pdf
    • http://tuluxevan.pbworks.com/w/file/fetch/145073106/watch_john_wick_3_streaming.pdf
    • http://gomedaj.pbworks.com/f/16678891674.pdf
    • https://uploads.strikinglycdn.com/files/29cbaf73-1e5f-4110-8730-677bbabb044e/7522855928.pdf
    • http://kelivesas.pbworks.com/f/downloadable_atomic_habits_worksheets.pdf
    • http://jedilukiwo.pbworks.com/f/pitepopesurularim.pdf
    • http://sonubugu.pbworks.com/f/daxevitis.pdf
    • http://mozejulinuja.pbworks.com/f/new_mms_village.pdf
    • http://bovozajezo.pbworks.com/w/file/fetch/145135266/hate_story_4_full_movie_download.pdf
    • https://uploads.strikinglycdn.com/files/82f999ef-1f57-456c-a2ba-c6dc29a17f38/wezulamufofipuxitalumupil.pdf
    • https://uploads.strikinglycdn.com/files/27a64bb9-85da-4f3d-b6c9-75db69e5781d/90050062876.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb3.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 6744 bytes
font_01_sfnt_off0000ec9a.bin
283814bc732e3aec2ebf5c82f8a612f55cd4b5be7ac20b8548f0fe794cda09da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9A 5752 bytes
font_02_sfnt_off0000fffc.bin
a6a8686b8fb15c9717d15c6992f5cb6599fab98c9eb18a738509255b94a7d84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 2252 bytes
font_03_sfnt_off00010a3c.bin
d655176a7dc9be8edc5f4a35177470dcf557ee013e47416b594804aced207a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3C 11256 bytes

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