Malicious PDF — malware analysis report

Static analysis result for SHA-256 0018285e252a0119…

MALICIOUS

PDF

81.8 KB Created: 2021-10-12 18:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 16337577cd045f37a29b56801e1c456d SHA-1: fb05a4c02b139dd5c515a39d479da88b89572610 SHA-256: 0018285e252a0119b70340091e375d275ae9dd20cd1b33248663a3b8386182b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=badminton+ground+length+and+width PDF link annotation
    • http://ahcxdq.com/uploads/file/021058387569.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/vexivudisexotovovaduli.pdfIn PDF document text
    • http://yepuco.com/uploads/files/77441252258.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615c126c9de11---49812827542.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/44621162290.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/zolaxatorufidaxogifekuk.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/rajipex.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/pobuxodituwabojoxusugidab.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/livasajopipabovufuwisen.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/timiwajelipira.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/kinuwenuxiwevuxu.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/kewipabevakalob.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/fevireridowogag.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/68891243246.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/57248865355.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142e9452e7db---97361103910.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1184e1f2e---76026026017.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/leberekeven.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/govujenarusu.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/e0ef945d445ab07684fed7edffed85d2/82670115632.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/20515251309.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/55658253734.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109152245277605.pdfIn PDF document text
    • http://cudicio.it/images/file/leganozuvijugukewelaxuxob.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_off0000dab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 18196 bytes
SHA-256: cace73296a6157ff5fe55e183f4eb19f4e015ed97a5ec936baba4d9f2e61a432
font_02_sfnt_off00012158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 10764 bytes
SHA-256: ebc4c62c55de00df03b0f5f84312b90a91f1ec62772e1d4b90ef6cb1a06f9546