Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b69089ccc008d5…

MALICIOUS

PDF

89.8 KB Created: 2021-09-02 15:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: dfdaf3910b0ae833f790cc76a995bb1c SHA-1: 89955b9489eb323ab8ef028eac4305cb0df633b9 SHA-256: d0b69089ccc008d535ce2963dd03faf2f0e96e44296b036406470a44328a621d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 http://physio-praxismitte.de/userfiles/9617851427.pdf In PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/bofip.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc0041f53---65179523634.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/wivaj.pdfIn PDF document text
    • https://chp-travel.ir/data/file/lozojemavafanukupegizuja.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/m4h9ve6lasv93qoil0p0mc2397/fufukibaz.pdfIn PDF document text
    • http://hk-keber.de/images/file/gavaxazosefi.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/mavexajepunadejejipuvu.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b646746581d---46045711017.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/6tdd3hbdv0c21quio786n790k4/tudozurenako.pdfIn PDF document text
    • http://yuha.be/_files/file/tuvozenigad.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084e1dc233f5---30730319349.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/gac9bns4pkkenrts0i5383t3p2/mupivugifu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/gujusomanodetuladudixoj.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/7032357846.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/rafitugemotekag.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/72464300099.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607123f048f13---14839522452.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/fafit.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/99ddsevbrk3irc334cvp3qv3q7/serafinujesimaliluno.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/974f251b25f7e7a481692b6db5a23c16/vujuwogegikiti.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b2218a88859---vedonemuzotuza.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/seratek.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/nifetukunod.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd8522f40e---ponuposexuparonawobuduzev.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/kemiwebewobufovebebul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=briggs+and+stratton+500+series+158cc+manual+pdfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000da12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDA12 19056 bytes
SHA-256: 11cd2828ecdf06bdb7a658e4e07810f345364ad3e9a13454351c429634fa2525
font_01_sfnt_off0000f8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F8 17128 bytes
SHA-256: 94fc22a6aa2650b6b96f1fcc840535884b3167253e6dafc4ac6f6cc963b10dd1
font_02_sfnt_off00012538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12538 11632 bytes
SHA-256: 445843d6f39705edb803718d08dcd588659886c33ce754c157feef45f0a9c650
font_03_sfnt_off000140c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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