Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a94f69a086f4dca…

MALICIOUS

PDF

74.8 KB Created: 2021-04-28 00:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b9becd86387aa6845e9afd52f323632e SHA-1: 226d1dd30cc7064e07f0c0c974d7f2debddd934e SHA-256: 1a94f69a086f4dca2e19f168c6d2a230eede7ce09dfb9e27493f514c5234ed3d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to a 'Garmin montana 650t update', suggesting a lure for phishing or malware delivery. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=garmin+montana+650t+update PDF link annotation
    • http://trysoda.club/briggs_and_stratton_generator_5500_manualzc4lt.pdfIn PDF document text
    • http://pokupka.space/what_to_write_in_a_self_performance_appraisalxehcy.pdfIn PDF document text
    • http://wonujabazuvopa.22web.org/62371866875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418558/normal_5fe50d13f2c48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_6026b62fe0d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_5fd9335d8685b.pdfIn PDF document text
    • http://disconto50.info/xuwogijome23ms8.pdfIn PDF document text
    • http://twobigs.space/aesthetics_definitionc4inl.pdfIn PDF document text
    • http://kunutudusoxa.mywebcommunity.org/green_and_stokes_theorem.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/39850254309gliwq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fc7d7d81581e.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_603c18bc2bb8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_383f2fd903d84099853f382b049038bd.pdf?index=trueIn PDF document text
    • http://gerifanonejuvad.rf.gd/asphalt_6_adrenaline_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c3438e-60f2-45de-bb8e-7225d7ad00b9/zitibapunevefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce8a521-c17d-4f7e-b372-66ee3eaddd95/how_many_ounces_in_a_magic_bullet_cup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a520f3-5ed6-4ac5-8b0d-33cb2f2e79d7/ncaa_banned_substances.pdfIn PDF document text
    • https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_8fcd66e036f84c24bcff167891adc38f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1dbcc81-4f7d-4e2b-aedd-0dba9bb469a8/bapuduxudakisuzojo.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_679679d6b4564ce2a6dd9934ecaba97c.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_9e9d3de489c84ae7829cbe2da83445bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d199e965-f11a-44e4-8381-0f2a5d36a84e/48714450459.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_016d4fdb491b42079dbec759e998aa0a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 5348 bytes
SHA-256: 39206dfdee47536b406937bc5213629e49895b35d99a3960d465646d46539b46
font_01_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 10168 bytes
SHA-256: 73161902cb5fd121d928a87dc9b05011f61e97c6a2be654c832bf4fb26858727