Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f3df3c57ab4e26…

MALICIOUS

PDF

108.9 KB Created: 2021-03-29 18:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 16997b82ea8de0128ba7f8d4ae094388 SHA-1: 1095e861d754c9d8ca82c3f02e08a4fb230f6c1d SHA-256: 93f3df3c57ab4e26144d75125c222e680dcdde88b264a52e37f67f2bd9b67bae
186 Risk Score

Malware Insights

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

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 0.9975

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://xezojetit.ru/wix?keyword=tigrex+armor+mhw+reddit PDF link annotation
    • http://fuvafutiku.22web.org/osrs_kalphite_queen_guide_solo.pdfIn PDF document text
    • http://govakokes.22web.org/sikevavuturejetaraj.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/h00ibje/country_music_awards_2020_performers.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/haujhhg/honey_bubble_tea_atlanta_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/hbhe3ja/tezizebizejiv.pdfIn PDF document text
    • https://cdn.sqhk.co/tigoxexuda/kihSgd2/kusumolokuvekeme.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/ij6giR0/big_buck_hunter_pc_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/YgiieTL/wamokipimeber.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/mosoxaxoxazotu.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/difNbia/magic_piano_tiles_game_download.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/47513575064.pdfIn PDF document text
    • http://gayerkan.com/terrarium_tv_apk_mod_free_download14emb.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/kxNidjh/xasigavesute.pdfIn PDF document text
    • http://differencecheats.net/contemplate_my_lifeqdjv1.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/jspdf_autotable_set_font_size.pdfIn PDF document text
    • http://academic-club.ru/pasegesavadigawitixudovju243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_7390113a7a244da4a49e0b3499ad0857.pdf?index=trueIn PDF document text
    • http://pevivudawof.epizy.com/28831207138.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/78590091868.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_e2172f23fb61439ab7046907712490a2.pdf?index=trueIn PDF document text
    • http://fefugadabojenip.epizy.com/importance_of_wastewater_management.pdfIn PDF document text
    • https://0b670cc3-d94b-4117-8b98-7ce677fb6c21.filesusr.com/ugd/7bc559_b66750e3ba894925922ae4234cdf5980.pdf?index=trueIn PDF document text
    • http://nununad.myartsonline.com/tissot_t_touch_connect_solar_release_date.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_5c557647ce054b26a75f4a4913a78445.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001459f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459F 4064 bytes
SHA-256: e83adbb8ce460893f131f34164abe10219de41f88f076d6796d810082a39ba5c
font_01_sfnt_off0001540d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1540D 5140 bytes
SHA-256: a34eefc2969c2f54ea41767157d1a5f01da468464d453e28ccde94012b1ace8b
font_02_sfnt_off00016573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16573 12736 bytes
SHA-256: 5f365f44adf6115fdff6f76b3ac54ea424c84f333622c70e2993e8ce048f3ef6
font_03_sfnt_off00018ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FF2 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073