Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f68eb8cb97ebb7…

MALICIOUS

PDF

89.1 KB Created: 2021-07-02 03:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0b5b3d5a14d6dd956249597cd329faf SHA-1: 35d059fcbec6c7668fbb07f439f58266ef22803e SHA-256: b0f68eb8cb97ebb77cab6261cd3638b7987111a0c1ab7471b9bda4d353a885be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. The presence of external URI heuristics and link farm indicators suggests the document is designed to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketchas.ru/uplcv?utm_term=the+sins+of+the+father+quote+bible
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad26ff49bfc---68027366297.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16075692438dba---21969389007.pdf
    • https://asset-books.com/userfiles/file/68182538597.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b42b4d0bbeb6d4c4d5690ca2e4b52dae/43510466654.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d82cfded091---xebadapoferigojurir.pdf
    • http://comp-art.ru/userfiles/file/mujisabawobiparisutik.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/5a45b8ba1e09e5f38ea5f2174040bbdc/kavuzutilenakifizobutiju.pdf
    • http://ruresept.ru/files/file/zijisasal.pdf
    • https://immobilgold.com/file/kujilezomepilidos.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/132886b26b994296e594dd1ea364fc25/49347381693.pdf
    • http://www.allatpatikapecs.hu/images/file/debojivoxiw.pdf
    • https://ekransamara.ru/files/najefome.pdf
    • http://af.ssla.ru/images/fornews/files/gelimitawokalosuzisubigik.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080cfeeb2b4b---vivirajogiserikafeko.pdf
    • https://ivanda-commerce.hr/userfiles/file/52385330696.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/2f4e43c3abf4ed0d5259d89e8bb034b5/dapofowowasasiz.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c79807a4f5d0a354bd691ea72d6f38ca/25824611031.pdf
    • https://a2designbg.com/userfiles/file/kedutodezewiter.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/27fcfef98184c59873f576b68cc5aa1b/sarigogubepilame.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/q48cpr2oelvmiqtc5d4meiqq9u/48606460780.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/wafobedosejuweguvo.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/e1963c14d35bb02698c3897cced7c57c/73285203975.pdf
    • http://palami.by/images/file/repegovedexawabo.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609858c949bad---76663763323.pdf
    • https://amrapalispot.com/userfiles/file/39249172590.pdf
    • 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_off0000fb32.bin
7e30d8324ed1cff9b13aa2ef2027b9e1c59c793e39a23a9b4a8ed2834a389799
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 16756 bytes
font_01_sfnt_off000126c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126C8 16792 bytes
font_02_sfnt_off00013edf.bin
edc3ed3e76a2960356eacbca8216ca1ea0e5d575dc0e50dbdf3e8ceda0af1f79
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDF 10660 bytes