Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0dcfb5196aff34a…

MALICIOUS

PDF

68.9 KB Created: 2021-09-29 13:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ab2ef8aa67dab77d07a5abb96dcb4877 SHA-1: 7f0b3fb3366dc9c278985c98463606176a3627c3 SHA-256: b0dcfb5196aff34ad5d8670de0455eaf42adc15ea1547db9f5d31cb5ed42ed5c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded links, a common tactic for directing users to malicious websites. The heuristic PDF_IMAGE_LURE specifically indicates this is likely a screenshot used to hide clickable actions. The numerous external links, many hosted on compromised CMS platforms or disposable domains, further support the phishing and link farm attack patterns. No scripts were extracted, but the overall structure and link farm suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 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://inwebjor.ru/uplcv?utm_term=stream+tv+shows+online+free+websites PDF link annotation
    • http://abwsalisbury.com/uploads/files/20714719250.pdfIn PDF document text
    • https://jurad.eu/files/file/18098944008.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/rapivenaxonujeramuwed.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/5b55056e8db09542f69fcabe50df25f2/78238286311.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/mafusexejogivatakeg.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/jefelalapudibabonozapo.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/96476649313.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/52092486553.pdfIn PDF document text
    • http://falconltd.pl/cache/file/89022956547.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/gurufexowerosif.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/snkt564uajj3rpfi37ek8s7mc5/50808410111.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/wuvulilomenubakigodete.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/67244325421.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/vutixibojazunekexona.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613607facc0e8---33910181152.pdfIn PDF document text
    • http://apismorava.eu/docs/nefililopalaj.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a76288d398---96318484289.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/51560291423.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614d202767104---24629255844.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/62033086053.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/13785916166134dbbf4b833.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/zevetejamig.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/63859305006.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/48273255909.pdfIn PDF document text
    • https://tcremich.lu/files/files/jegavusujidoletufuleli.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210928_6159952C85FA4DC2.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_off0000b0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DB 10848 bytes
SHA-256: 761a2b0928255e3670e60ced6b5af86fa780d2a895de863cdc274a50fcee6788
font_02_sfnt_off0000e1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B9 14376 bytes
SHA-256: b9857af792e54b27fd8bb49280aeb267c135f5e186b5646fb4914d3a290f0b4f

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