Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb53f09780f60861…

MALICIOUS

PDF

84.4 KB Created: 2021-09-23 18:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a3aa13c427208a7515f805bcd70dd239 SHA-1: 018117fa90bec2a877141db8c5dba33d7292237c SHA-256: cb53f09780f608613c409bc9fe37c19275b2649717b37617d71b6c34183975cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be part of link farms or compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=movie+time+tv+apk PDF link annotation
    • http://www.hermosabeachbungalows.com/userfiles/files/93477528288.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/56391942575.pdfIn PDF document text
    • https://goodline.by/userfiles/file/30412097533.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/68419507245.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614056d994a37---84152300252.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2d28670c0---vewininivifuxonix.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/pimaxesuma.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/98440657120.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/firipud.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fc75afe39---68278672246.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/48718314405.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/33668385159.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1614bfd9579236---selugubuganamibigesutu.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/41702379548.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/metuduzujobipajaziri.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/74478975646.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/vapexozi.pdfIn PDF document text
    • https://coombs.gocascadia.com/images/cms/file/12416027639.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145856c822ab---vasajededoro.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/birewumifalajeke.pdfIn PDF document text
    • https://cansandientu.net/Images_upload/files/novizij.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/67142962105.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/5727371629.pdfIn PDF document text
    • http://taichielite.com/louis/taichi/ckfinder/userfiles/files/15228381674.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_off0000e3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 18660 bytes
SHA-256: 541a28c9217271ba034107af32b01ddd9fe2228bad0c2eaa349d6f8411289431
font_01_sfnt_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D16 10148 bytes
SHA-256: 110cd4c576cd1374a5b710e27b7cb2cc945d1d90c057da8575327a092fec43e8

Open this report in the interactive analyzer, or submit your own file for analysis.