Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2790062a3063a22…

MALICIOUS

PDF

72.2 KB Created: 2021-02-08 02:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4a587d4df128dbb4755aa5b42681bb0b SHA-1: 5693519ed9a6db66c254bfb19ecd1baeded9d7f9 SHA-256: e2790062a3063a22dbe5d4a496477eb4b5e40c7f5e0537b3d708368a44ee55c8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, with one prominent URL leading to 'baarspo.ru' and disguised as a manual for a 'Gold gym elliptical 380'. The PDF also functions as a link farm, directing users to various other PDF files hosted on different domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and embedded URLs point towards a phishing or social engineering attack.

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/123?utm_term=gold+gym+elliptical+380+manual PDF link annotation
    • https://cdn.sqhk.co/samivegin/Ojbhhhi/wild_west_redemption_gunfighter_shooting_game.pdfIn PDF document text
    • http://lidzadva.xyz/pavofudurakotagogubedicz0zj.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/idBhfji/steven_universe_warp.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikifabaf/NTPggX4/farm_tractor_line_art.pdfIn PDF document text
    • http://verifybadgehelp.com/capitulacion_de_santa_fesd8v2.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/JCAQgfP/ups_hub_goleta_ca.pdfIn PDF document text
    • http://cookwellbakewell.com/cydia_iphone_7_plusnw5ms.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jjifPii/77841885739.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/ig3jcif/sexavubu.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/r8MHlia/wixubopeva.pdfIn PDF document text
    • http://apkweb.net/mejufixubapagiwigahza7t.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/seriposuj/zobozemive.pdfIn PDF document text
    • http://fudavifakafolid.rf.gd/kajaporoli.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/zugunufuzojonom.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/lutaxevimizo.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/moment_js_date_format_am_pm.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/schneider_electric_altivar_61_programming_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/fuwawexulilesulavugime.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/project_assessment_report_example.pdfIn PDF document text
    • http://maxajufabes.epizy.com/33815475514.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 5752 bytes
SHA-256: 8d4017fe0f79408591cdf753e228431dac5236130ea523fb1d6f2cca38cfa320
font_01_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 11816 bytes
SHA-256: 206a44b03881291eddac80b7adf326a8f61f98af79352ac79b8b69b3a411d8f1

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