Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa6780febeda4dd…

MALICIOUS

PDF

144.8 KB Created: 2021-03-14 10:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 867aa98074bd28b7ad637b09df9740e7 SHA-1: 5e691de6704dbb54c8e58c65cf663c9dda1941bd SHA-256: 7fa6780febeda4dd6f6e3bdf2202e030fbca84fdc58c71ba3824326b802ae10b
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO purposes, likely to distribute malicious content. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=2011+vw+jetta+sportwagen+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499653/normal_60048259daa5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_600f2e851ca6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_602f512f47d6a.pdfIn PDF document text
    • http://vowitufafuzebil.scienceontheweb.net/how_to_replace_anode_rod_in_hot_water_heater.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/95912172233.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/bieiehi/werewolf_mask_with_moving_ears.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/geOidih/free_fire_wallpaper_hd_download_for_android_mobile.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/37407047674.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/zidjdMn/mupuj.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/70172664263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1447f3-9f27-4728-9624-5936b68a6aa0/3422374631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7368958-b238-464d-9872-a91c4da154c4/21914761468.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/best_currency_pairs_to_trade_for_beginners_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581361e7-33a5-4139-b3a3-79ef1d6b542e/stanley_wet_dry_vac_8_gallon_bags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f8bdb0-3aa2-494b-a3ec-bd7fd76d9058/study_pre_algebra_online_free.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/77490788857.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/75808573647.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/alexa_default_voice_assistant_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd494835-0d94-48e6-8fe8-cbd826538a58/rowobevevikez.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_off0001e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E492 5600 bytes
SHA-256: 15d3b72d103de4f67fb2e48302f7d87c151804fe8d3fdf989b9c45eb786f32b7
font_01_sfnt_off0001f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7A5 11676 bytes
SHA-256: d1c465f8b7bd2e9644c8b0d2ef4f2a5b256c938b9b946fac1e6af3afd9e5bd0e
font_02_sfnt_off00021f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F9C 16220 bytes
SHA-256: 9082b1b293b119b8ed4d5b512278aef50c76123e38417ef93fed934800719b2c