Malicious PDF — malware analysis report

Static analysis result for SHA-256 45567f534c85cb74…

MALICIOUS

PDF

88.7 KB Created: 2021-09-03 17:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 19f7dff30ca6ea82668a513c21c867fc SHA-1: ad4785c1b935abebf31a651e40de85365ac08e07 SHA-256: 45567f534c85cb740c7dc621147f08f70debac560896de2762983918b5a2f925
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are hosted on disposable domains, a common tactic for evading detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://garglob.ru/uplcv?utm_term=geoffrey+moore+crossing+the+chasm+pdf PDF link annotation
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1183a8c3c---belejeborilitibewuxenik.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/42112690774.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609165c7b287e---sukojividufunajetufetevaz.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/powazilewek.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/sj9gl1is4704n4blpgeauk87o3/nofemebotavugisavubavebi.pdfIn PDF document text
    • https://chp-travel.ir/data/file/20648547022.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ec3774fb61776db3be45b5cdbbb28fcc/95688550099.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/f6dee1923294465936a99b1e4ce247f4/gesapufoxolupufowupi.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/2kk6bsj6efuufpace3k8b4b6q5/rubiraduvarezozivi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16102ece720acd---zorujutaxewilo.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/vumilo.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/zipaxawifowidafuwe.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/45997582573.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/25a79e71cf419f89ed9b645519b02943/nenitusarebupew.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/sodafutiwinoxominawolu.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/betuvakifonomuj.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/gosen.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/rutelonamapazelugevara.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/26265214016.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/adaeb07919dc572526509453f9deab49/71880762243.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ragmp7jev6ua0vnkda8e8lt911/16973417247.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/74349162737.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a2542797ad34fbc38b1e71a63763b4ac/42432536108.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e0617f4d8---duzisomuv.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://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_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 17712 bytes
SHA-256: 1ee08852d2622297feb82ed9904525de0b975d78fdc44167cceb91a17d9fef51
font_02_sfnt_off00012409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 11172 bytes
SHA-256: 4cabd757a948fe03de8b2f343de202479021bf139d143b67876b81734a10e394
font_03_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878

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