Malicious PDF — malware analysis report

Static analysis result for SHA-256 693996bd15b9343f…

MALICIOUS

PDF

71.6 KB Created: 2021-02-20 22:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 108464d2e19993b1ee887470289db3df SHA-1: 5da8a7ecab0807c8189927dc63ead523509ba8a3 SHA-256: 693996bd15b9343f7a2d45bf9a9023dd1edb603c819b99da99dc02c9ee393ca0
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, includes a URL that aligns with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=what+to+expect+before+bariatric+surgery PDF link annotation
    • http://gogejevi.iblogger.org/all_abba_songs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/ic3Anjd/iron_cause_rash.pdfIn PDF document text
    • http://cashfree.store/kegibemrjb5z.pdfIn PDF document text
    • http://max-lifting.store/fazalerotorifezelugojolapu8fgd.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/zmPhhJI/vufikepojowapof.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/jevGuxj/smash_it_break_room_denver_co_80223.pdfIn PDF document text
    • http://erogan24.website/puertas_y_puentes_ligeros_mod_para_mnlh4k.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/lhhiaic/11stone_9lbs_in_pounds.pdfIn PDF document text
    • http://zabavnyi-slon.ru/xefabe6vvli.pdfIn PDF document text
    • http://afracheat9.xyz/zedge_app_free_download_for_iphoneibtua.pdfIn PDF document text
    • http://tumbochka.space/406009297595lrgw.pdfIn PDF document text
    • http://coolvdomaion.online/rirudikozuvosenra9l1.pdfIn PDF document text
    • http://devicesprotectionforusers.site/block_craft_3d_hack_unlimited_blocksmjael.pdfIn PDF document text
    • http://goldstein.capital/sexitigadurebizopidipex4tegl.pdfIn PDF document text
    • http://lemixebu.22web.org/dunarozizimujijawuwezam.pdfIn PDF document text
    • http://academic-club.ru/gunimolurewodana24r3i.pdfIn PDF document text
    • http://carluxepaint.site/kusetanfqlze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovijoj.epizy.com/red_book_mao_tse_tung.pdfIn PDF document text
    • http://sukujarodapix.rf.gd/byomkesh_o_agniban_full_movie_1080p.pdfIn PDF document text
    • http://jiwoxofor.rf.gd/fjalor_shqip_gjermanisht_free.pdfIn PDF document text
    • http://kulixuvomewono.epizy.com/alto_sax_jazz_solos.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_off0000d934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 5568 bytes
SHA-256: e64de4e89464ec60297271f2350133d18c188304acc0bcbd18a5912a3e72e6e5
font_01_sfnt_off0000ec39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 10632 bytes
SHA-256: ab8678086f8bdb7f32e95ee9209ee4099da8b2bc99d8672790e348fe4ed814ff

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