Malicious PDF — malware analysis report

Static analysis result for SHA-256 f306f58d876d2178…

MALICIOUS

PDF

84.6 KB Created: 2021-09-02 08:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3de0d8c64a065d004cec8374c6aca08f SHA-1: 5213be0ab501f25251c40da9862f3c90d65e9c2f SHA-256: f306f58d876d2178d05777f225dba1d1a4f3fbba7f2e2aea532f292036e1dfac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to phishing sites or download further malware. The presence of external URIs and link farm characteristics strongly suggests a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/uplcv?utm_term=ppsspp+free+download+games+iso PDF link annotation
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/xerunorazikojefuvodidamil.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfc873e918---81332562086.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afd3e3d9928---diwabedetik.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/37953077881.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac156ae0438---mikufogilufe.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/gulajufitulalufaforote.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160870da689395---7750369450.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/mv0ao7ig6de9ho1i04ne6h2ca1/vefimamikaritavekubebiza.pdfIn PDF document text
    • https://sambelteri.com/contents//files/79044346613.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac570903f02---49445848144.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/60f2eq4acl7o87u0k03d8eb0v7/40670875925.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210812170139.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/zadem.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/vidasasuwusimaxizesidisif.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a47434a8e---wotobuzudexamuvenefaba.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160766f137c252---walikitigulilumol.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/kejabomekimubazariwibodi.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/tajexaxovesasujuxanizimuk.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/78995021818.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/ropovav.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/pqfm93652sip7qi0n4k4q9a1b0/48497548204.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/am8tq8cpofrlvl880uq51smagb/70849989857.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b70b227acf---nesajemopana.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/pm5cuokt02l487ijrufa3iqas6/23519145285.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/laxir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 17756 bytes
SHA-256: 5493f4d7e68666bfb2072e8a83d95491dbd5ef458968e485824ec76c6a7dfcbd
font_01_sfnt_off00011324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 10828 bytes
SHA-256: 12084bf042cecfbd87b98e2128952ce4ae5fea4f9a789d922fb0b20dda7cac95
font_02_sfnt_off00012be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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