Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58c59d444c2d574…

MALICIOUS

PDF

68.5 KB Created: 2021-10-01 19:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 29ef8d9e72e0145a5092a86caf8b2e58 SHA-1: 401ae70c3b391c52fba786383479b56f3e0c55bd SHA-256: c58c59d444c2d574424d60d66f0c03de6b4a4c2807a4a771f495472e53d9afa9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic PDF_IMAGE_LURE suggests the document is image-based with a clickable action, designed to trick users into navigating to one of the provided external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=shooter+movie+actress PDF link annotation
    • https://harley.dataroom.tw/upload/files/58671670248.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/23175804757.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/pazilusudexalawej.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec0582c41b---31003933803.pdfIn PDF document text
    • https://sunrisemotelbellevue.com/nbloom/fckuploads/file/83157670214.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/muxinanizugojajuse.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/jezokekugabukisudefiro.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/1622641039.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/31017959781.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/zunevaje.pdfIn PDF document text
    • http://tianfonmm.com/d/files/79853917253.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/51799694246.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/67317833535.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/nuxakagesuweni.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/56729144710.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614232f6d01ca---suwefuv.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148977087461---30152013301.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/91274573848.pdfIn PDF document text
    • http://euphoriaclub.fun4two.pl/uploads/assets/file/tujesukazutaxeximav.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/17548288742.pdfIn PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/69771406395.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/2r232lgm9prmkifmsg3v1agbbo/33217548234.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/48344197639.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/16558434113.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/demefivogufoladofovef.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/35306061101.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_off0000aff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC808 14692 bytes
SHA-256: 4036c2370ed9aa571a0170d789737d31dd0a2a6b11411530fe055f5943335be8
font_02_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10488 bytes
SHA-256: 429bbabdbad314984e2820e0821b40780297ac08c8536e400a9c1d19471ee2aa

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