Malicious PDF — malware analysis report

Static analysis result for SHA-256 d580a74a95381a09…

MALICIOUS

PDF

86.7 KB Created: 2021-07-01 18:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc75efd43e222fe3381bc112716b3423 SHA-1: 594a3080d1655ed03eb6cfab9479a7410baad2a3 SHA-256: d580a74a95381a090b5aa1ab7f0cf2de502527908691c68ee6c0789db76cb237
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external resources, with several hosted on compromised CMS upload directories. The presence of these links suggests an attempt to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soudurelauziere.com/upload/editor/file/mobijinobuwudolelipov.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/615e366fdc66925da05ef040bb566774/67143941067.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/7b870fac203f1bc9ea340a51a2547ef5/83652624292.pdf
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/nudenijiroximuj.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/uc4odqrcn9d3lo94o9mtgu4vd1/10669182923.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160757ce74db13---bomafogelowosovotevas.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afb8708793---fogesawojikaxi.pdf
    • http://beveragesgs.com/userfiles/file/paxezotewokub.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cdeb334b0---fakafazipuxun.pdf
    • https://calmoinc.com/upload/editor/file/64122193352.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/demalifafun.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b938e4dec6c516c281def6e66bc33eff/50361130414.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c5d83b243---58408790334.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d4c3f27c---sapepatafusozevi.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723a0661fa9---96352159976.pdf
    • http://x04ydivan.ru/userfiles/file/mijeredezutasemewan.pdf
    • http://maidichike.com/upload/files/3969304413.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092089c2bfa6---vadorosopibokesowik.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609152b24e1d9---kenowedowozuresak.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/zoxuzonijexupeferi.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ab718f11e---69748660618.pdf
    • http://polish-house.com/uploades/fckeditorfile/23352103074.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b18efef0ad---poverijupofudajawijonewo.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160904df12a8bf---60709287538.pdf
    • http://vietthanhstone.com/images/news/file/39184660106.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/0ab2f8677737e8270208b9dbe56d5775/28854629080.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cohen+brothers+middletown+ohio
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7E 16792 bytes
font_01_sfnt_off00010590.bin
9004750ff9017acfe4b0df2ee03e16499686f2e6d1d29405ec35743647399214
pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 18360 bytes
font_02_sfnt_off00013555.bin
f915c27b9f8e427f14e3e9cf6566484defe3e31642bc727ffd6e9694a906931a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13555 10608 bytes