Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f78ccce0d119eb7…

MALICIOUS

PDF

80.2 KB Created: 2021-08-19 17:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0a6714d36ffdaaa1dd6c933ad764444d SHA-1: 68c896b2a43e901868fceec42e58b01f847a0f62 SHA-256: 6f78ccce0d119eb7718502b04a79d44c438b7a6fc5a1d2607a4872374995ee30
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress upload directories or disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=the+twilight+saga+breaking+dawn+part+2+soundtrack+download+link PDF link annotation
    • http://abwmechanicsville.com/uploads/files/kinilataxilulizifapo.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/wisesorifonigukibep.pdfIn PDF document text
    • http://termocity.by/pics/files/kifatuge.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/23846192618.pdfIn PDF document text
    • http://benrassam.com/uploads/files/85540921966.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32d3b2e2df---pulilefemuxonorudikagogal.pdfIn PDF document text
    • http://soupworld.de/upload/file/fujixagafuduniwetavusoru.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/84544951071.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/dumeradaleworupa.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160771de8d2241---xezasofexuwuvufamedol.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/cq6c6bbmf5c98mn7rb7b3usjob/figikigowinanufoma.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/91608561632.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/62389807793.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/12234460444.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/78910961304.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/3848327837.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071568d19561---lexeso.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609217b72eba0---siduzuj.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc67848df2---14294516579.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/8bneaecs7nkcp1jeho7e2onr1r/48794350373.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda9b29af91---fivudovetono.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/33245704104.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/36213938571.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072849625444---mozekimovaxojumovupe.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609668801d2bc---jizogu.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://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_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 11296 bytes
SHA-256: 50863835e4db5d2e0194ee30775d45277b1894d08889697cc5905aa2ca7ea250
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 16904 bytes
SHA-256: 119cc8c3ba7cb8b1795b3acdd047b33029dd8180c6ee1c3c7ddaa506d978a10f
font_02_sfnt_off00011edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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