Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12ea9117197de5e…

MALICIOUS

PDF

72.7 KB Created: 2021-01-15 04:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1836a4b203ccfa2fe4efc1613cd1abad SHA-1: c0ced4b4771adbd268ea892b43f00d814eb9df4e SHA-256: d12ea9117197de5eaaccf4acc1b37bdc3c7bb1f43b4771c7faf0594bb605b713
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 0.9997

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://trafffi.ru/123?utm_term=use+of+weapons+pdf PDF link annotation
    • https://site-1179818.mozfiles.com/files/1179818/twisted_wonderland_lilia_x_reader.pdfIn PDF document text
    • https://site-1174259.mozfiles.com/files/1174259/1010638685.pdfIn PDF document text
    • https://site-1175227.mozfiles.com/files/1175227/86265464839.pdfIn PDF document text
    • https://site-1173911.mozfiles.com/files/1173911/samsung_s10_live_wallpaper_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/fxYQMgg/h_band_smart_watch_instructions.pdfIn PDF document text
    • https://site-1206062.mozfiles.com/files/1206062/35935104521.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/hhuohg6/space_wallpaper_for_pc_free_download.pdfIn PDF document text
    • https://site-1176532.mozfiles.com/files/1176532/9_months_game_tips.pdfIn PDF document text
    • https://site-1167950.mozfiles.com/files/1167950/lego_batman_dc_super_heroes_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/jhgfjcv/drive_safe_and_save_reviews_2019.pdfIn PDF document text
    • https://site-1168308.mozfiles.com/files/1168308/47573387256.pdfIn PDF document text
    • https://site-1207127.mozfiles.com/files/1207127/13100489675.pdfIn PDF document text
    • https://site-1177229.mozfiles.com/files/1177229/73611578843.pdfIn PDF document text
    • https://site-1178831.mozfiles.com/files/1178831/80856416603.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/zuguvoxoki/24601481623.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/varrock_diary_osrs_quick_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 4992 bytes
SHA-256: ce6d25ce5186e53ec37a0093fdb12544f44db26c8cb8a1fb0a6ca9ba5c3ef25a
font_01_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 10664 bytes
SHA-256: a9ee1a1d1000507773445c055b88b11441e581920c0c0da111b613b6477f641c

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