Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0fdbd6f7e37cee…

MALICIOUS

PDF

94.4 KB Created: 2021-03-10 13:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 048eecabaa518296a89edb552d88dabf SHA-1: dfa646a598cbd73c456084cc2f8386612991222d SHA-256: 6e0fdbd6f7e37ceeca50e683950955ce1f51a0d511ca85f123c174cefbba882a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or distribution mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, suggesting it was programmatically generated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=scrambled+sentences+pdf PDF link annotation
    • http://sesopuligu.iblogger.org/cazadores_de_sombras_2_ciudad_de_ceniza_pelicula_completa_en_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/jaWoxw0/mx_player_pro_1._15._9_apkpure.pdfIn PDF document text
    • http://galajikimozupu.iblogger.org/vanilla_ice_cream_nutritional_information.pdfIn PDF document text
    • http://virenoveza.22web.org/86216847547.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/YGhhojh/masha_and_the_bear_child_games.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/eiaOCie/1584390862.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/pc_games_free_download_full_version_for_windows_10_offlinep4a7g.pdfIn PDF document text
    • http://bafujowop.22web.org/hallucinations_dvsn_song.pdfIn PDF document text
    • http://tekplafond.xyz/guide_to_getting_it_on_9th_edition_free_downloadaidjn.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/jhjooid/dr_norman_davenport_fort_worth_tx.pdfIn PDF document text
    • http://peuly.xyz/863819273914dyv2.pdfIn PDF document text
    • https://cdn.sqhk.co/sukonazukuv/uywgmhh/nonosevujewalifaxetajuna.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/gja0Vhb/2870513224.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/TtWqgjs/my_hair_salon_niles_il_60714.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_7526d99e51a849f0ac9e9b25eb78fceb.pdf?index=trueIn PDF document text
    • http://xabiworaw.epizy.com/do_subarus_have_transmission_problems.pdfIn PDF document text
    • http://dopelafoxumamew.rf.gd/the_12th_planet_espaol.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_c1a432f96e0e49d9a92c7472c838d9a8.pdf?index=trueIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_10869de7268247a6adb00ea9c039f298.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_4441eb732c7e490a9fb66c48d099c1d6.pdf?index=trueIn PDF document text
    • http://tuguwobafadurot.rf.gd/61925587593.pdfIn PDF document text
    • http://sexikiti.epizy.com/65474913432.pdfIn PDF document text
    • http://tipikirobis.rf.gd/mekolunizabiwakivere.pdfIn PDF document text
    • http://faxumev.epizy.com/guitar_songs_for_beginners_chords.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 5544 bytes
SHA-256: 5273c60154c6876ab62b19a490c29435853921029e5e43a698d5c532bc1f0a52
font_01_sfnt_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 14792 bytes
SHA-256: 21e63468fce1db62de950bc2adf92c1fa471b0ae93b0df77b46c18e7302f8957
font_02_sfnt_off00015350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15350 16284 bytes
SHA-256: 3f0ce44b5059d3e06213a1ed35b21329415b50d0aca79531b684bea49e7e1ca7

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