Malicious PDF — malware analysis report

Static analysis result for SHA-256 74671fff30fcdf75…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 07:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ce4eeb560060b7b200d4bb99d94c7935 SHA-1: b05809e2f80ad4d4f33da2987b13d24be7fdaa85 SHA-256: 74671fff30fcdf7504d2b55a0cfa0b23e4a89a68be1bce8ec72c33656ec8ca4a
126 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to funnel traffic to external sites. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/wix?keyword=lanky+kong+smash+bros PDF link annotation
    • http://timelessdecorum.com/adobe_elements_2020_pricecnelp.pdfIn PDF document text
    • http://form-copyrightservices.com/bowipagugegowlyc5.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/id8gjcB/off_road_rover_e1_off-_road_tent_trailer.pdfIn PDF document text
    • http://shop-you.xyz/239715977238ib58.pdfIn PDF document text
    • http://optamorem.com/someone_like_you_karaoke_guide_melodydncx8.pdfIn PDF document text
    • http://devedilazabu.medianewsonline.com/97614316731.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/BjehfiQ/christmas_background_free.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/kufituxozo.pdfIn PDF document text
    • http://stavki-na-sport.site/the_macro_economy_todayuxk2m.pdfIn PDF document text
    • https://cdn.sqhk.co/rotazokufaj/j1k5iic/domain_and_range_set_builder_notation_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/juviwonu/DWjagdK/ranogigorajiberozukipi.pdfIn PDF document text
    • https://sufunisukexe.weebly.com/uploads/1/3/1/3/131381546/031d2fc932a.pdfIn PDF document text
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/8775456.pdfIn PDF document text
    • http://vermono.site/nurajugivil6aexl.pdfIn PDF document text
    • http://rosolab.scienceontheweb.net/latex_math_symbols.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/bajobazonapipemalilar4dw7a.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/ramofijunuz.pdfIn PDF document text
    • http://koreanluxe.com/xavirizapabanilsqd6h.pdfIn PDF document text
    • https://sefositudixe.weebly.com/uploads/1/3/4/5/134524400/6be4a2f15e126eb.pdfIn PDF document text
    • http://albatros-trans.ru/surah_mulk_textqja1p.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/kieWCH8/are_there_cheats_for_farming_simulator_14_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejarisiwudu.atwebpages.com/korapomapuxobikavawal.pdfIn PDF document text
    • http://sadozejeko.myartsonline.com/vigilikopezarofavegupo.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_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 5312 bytes
SHA-256: 340790f0eac9c2a95041f42b4a190cb4314f6e66c37333ea58ce6c8dc7981c9e
font_01_sfnt_off00010c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C07 10196 bytes
SHA-256: cf0ad44c52aac17341cfefc01b39beb4fe78470472aba01ff5961d0593f99a80

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