Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d672aabad4220b0…

MALICIOUS

PDF

83.7 KB Created: 2021-03-25 01:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: be22f6c0774f1adae72381035db98533 SHA-1: 07147bac96c5a00a96942a3b4f835ce612f82059 SHA-256: 1d672aabad4220b052e404f5ae45ff97a153a48488f82df80bc107a85bd8194c
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to external sites, flagged as a link farm on disposable hosting. ClamAV and ML classifiers strongly indicate malicious content, likely phishing or malware distribution. The document body, though obfuscated, contains keywords related to ebook readers and the authoring application, suggesting a lure to download or access malicious content.

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://zajinet.ru/award?keyword=bester+ebook+reader+f%25C3%25BCr+pdf PDF link annotation
    • https://cdn.sqhk.co/zejejofe/aohcgdp/42821145887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5feca0ee78ca0.pdfIn PDF document text
    • https://cdn.sqhk.co/wavivatus/d1bjaji/plants_vs_zombies_mod_apk_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/Y7wCjFs/nosilufafus.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/hihcRA3/97341834377.pdfIn PDF document text
    • https://cdn.sqhk.co/lunemitibojo/qrhhjhH/55058477540.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/dihhcjf/letafasukezumomore.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/hdhbjhG/world_empire_2027_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/jMjfgjO/piano_tiles_pop_music_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446944/normal_60002041c1828.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/kjfhbhc/gegik.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/ijjakhd/fetuzewovotekowose.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/9nFjizD/music_of_the_90s_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/hhuzjdo/cat_simulator_vietnam_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/KEhfLig/56859007309.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/ghgEHZA/tozenijibojepizixev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485445/normal_5fd7b1c1b7487.pdfIn PDF document text
    • http://rodupokikoxozed.22web.org/song_hallelujah_by_jeff_buckley.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mededulafika.epizy.com/the_mandalorian_cast_episode_9.pdfIn PDF document text
    • http://bovapefe.epizy.com/beer_lambert_law_experiment.pdfIn PDF document text
    • http://lenixad.epizy.com/painting_process_for_sheet_metal.pdfIn PDF document text
    • http://xukiwelufa.epizy.com/kenmore_quiet_comfort_humidifier_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_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 5376 bytes
SHA-256: 08b9d2d810ae480846d6d9fc4a2864784a77756d5da0d8926a2499872c3a5eb0
font_01_sfnt_off00011b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1B 10712 bytes
SHA-256: 46a8e5f322e74511d7ce531051a68070c96e00ffe5d3b4065e819fd21bf00389

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