Malicious PDF — malware analysis report

Static analysis result for SHA-256 187e587da35c6d72…

MALICIOUS

PDF

84.3 KB Created: 2021-02-22 08:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b13858bf9451e3e5ed8ee0cfb283938f SHA-1: 56fb17a14ea5254a5f9b3490efd6379dbd1dc4c5 SHA-256: 187e587da35c6d727b60f77ba4fcde2b34755e79d142a5810e675831bd323bda
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The embedded URL 'https://baarspo.ru/wix?keyword=purefit+keto+price+in+qatar' suggests a phishing or scam attempt, likely to redirect users to a malicious site. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=purefit+keto+price+in+qatar PDF link annotation
    • https://cdn.sqhk.co/jonuwezipagi/cjdx6rq/pokemon_go_plus_battery_life.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/RFTHRcD/odd_man_rush_rating.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5fdfd562822ec.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/cPlhdPA/vurukowuvekukenupo.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/QlCOieM/20867289587.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/jgGgdgc/befofivekenezazidewitok.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/jjhaS7V/fuvokolesufikudomiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_5fcf945c2413c.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/jghe2ji/repajowexubifuxeki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/couper_un_en_plusieurs_pages.pdfIn PDF document text
    • http://bodotekufuw.rf.gd/moxagugobop.pdfIn PDF document text
    • http://waraxiv.rf.gd/481701445.pdfIn PDF document text
    • http://terujak.epizy.com/ruxotopig.pdfIn PDF document text
    • http://tozoxuzev.epizy.com/collagen_infusion_facial_sheet_mask.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/campion_school_hornchurch_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/62727313383.pdfIn PDF document text
    • http://telomilabevi.epizy.com/47206944047.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BE 4988 bytes
SHA-256: 1f2c4dc353fcfe9fe5a52b14217ff17e6c458bdbafb007e9e628c8c6c517214a
font_01_sfnt_off000108d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D0 11116 bytes
SHA-256: ff84c41fe7b6add6b110ffa9ebdd18d96496324bb158a15a32c9d7a17f5c37bd
font_02_sfnt_off00012ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE8 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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