Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0745ee3c0aeb5d…

MALICIOUS

PDF

85.9 KB Created: 2021-03-09 17:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e3cbd23e24d55fe4dc1c9284c7240100 SHA-1: 2f5df683273d4e19b1732177e169095259c1d30f SHA-256: fa0745ee3c0aeb5d458ffb84f658e38fea31fd8966b9bddf7130489acdc4b791
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('druttle.ru') that appears to be part of a link farm designed to redirect users to potentially malicious content. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose, which is likely to lead users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/award?keyword=avermedia+game+capture+hd+ii+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448137/normal_60439712c9585.pdfIn PDF document text
    • http://takovod.66ghz.com/2015_audi_r8_performance_specs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5fcdb2459af71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485568/normal_603b2bb1b9274.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/ec14d59d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fce872999e90.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/182079.pdfIn PDF document text
    • https://gekowodi.weebly.com/uploads/1/3/5/3/135321574/dopub.pdfIn PDF document text
    • http://rekabiwuxu.22web.org/46707092504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_6044917a723d7.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
    • http://didopip.epizy.com/tugalixorekofumomu.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_004567ae796e4223994bc4f5a7135653.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kevava/buffered_vpn_for_pc.pdfIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_42b5b6e7fe684639a121e11ebb549a3e.pdf?index=trueIn PDF document text
    • http://fefomuk.epizy.com/answers_pet_food_bulk.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/44917860433.pdfIn PDF document text
    • http://rinakarun.rf.gd/what_is_a_feedback_control_loop.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/clinical_laboratory_science_review_a_bottom_line_approach_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/97181730080.pdfIn PDF document text
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_ae21c48d440e4eed90fa335abeaab7e3.pdf?index=trueIn PDF document text
    • http://fopagozijudiri.epizy.com/85210479940.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_d2ce4744c4034ebfb59080f83d7cb756.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujapomib/meme_songs_sheet_music_piano.pdfIn PDF document text
    • http://biwodonugawodil.rf.gd/35439912232.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_94ed65773aed4e7eaac930f921a47b5d.pdf?index=trueIn 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_off000105b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 5072 bytes
SHA-256: b3fbc5354924d09875d9ccad1fcbc41d97130a9a1a515caceadfd1c8d208e41a
font_01_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 10768 bytes
SHA-256: 71429c573ec92d5229fc279015f95ad3bbd218d554eb9354ce542a25c25eb469
font_02_sfnt_off00013bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34