Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d72d915d6a04bc8…

MALICIOUS

PDF

71.3 KB Created: 2021-02-26 14:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 023f2ea79ef3a064d6dcc561513e256c SHA-1: 176f7f86e40398f38aaea601ae42ee68f28431a7 SHA-256: 9d72d915d6a04bc8be3bda3813dd88700457f70a2c2d1fd2d82a6eedb9e67246
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/wix?keyword=2007+toyota+avalon+service+manual PDF link annotation
    • https://cdn.sqhk.co/rekosiseweno/Eeha1ih/xozavumepawit.pdfIn PDF document text
    • http://titanovyi-filtr.ru/dell_e6410_a09_bios_upgrade0gi13.pdfIn PDF document text
    • http://good-production20.site/calcular_el_calor_de_combustin_del_metano_a_25ocoj5r5.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/0jagihc/zepuwesapaxokoxufifi.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/bojijgq/maze_lucifer_actress_change.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/iekjhjy/70340246710.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/Oo3gfjb/pixel_starships_how_to_get_dolores_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxovugefulo/egdifp6/sniper_shooting_games_for_android_free_download.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/dlink_dir_601_manual.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/nixon_watches_near_me.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/imbalanced_nutrition_care_plan_for_elderly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bototiluwoge.atwebpages.com/honda_gx340_engine_parts_manual.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/vilewinuxipiviwuxomiked.pdfIn PDF document text
    • http://jemileti.atwebpages.com/titansgrave_character_sheet.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/briggs_and_stratton_small_engine_replacement_parts.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_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 5368 bytes
SHA-256: 759dbe64fd2244d8b4f0157800871a2a59c257116b04ea42c5f6f30aff22bd16
font_01_sfnt_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 10644 bytes
SHA-256: 8714b41f22b0d73028c33eef7d6983dc9c44cee0ac7f9d48d4a8bda12ca7eb62

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