Malicious PDF — malware analysis report

Static analysis result for SHA-256 12349eabbc1f9dfe…

MALICIOUS

PDF

84.3 KB Created: 2021-09-03 23:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c8104ce10b961ba2fb9a65ec2c6df923 SHA-1: 6a2a91cf19ea22d29253b1aa5b5fb3a8cc8ef131 SHA-256: 12349eabbc1f9dfefb27e0c8f8df6c069d782472bc50dd20a49a98e076c081f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF being part of a link farm hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://branchennachweis.eu/userfiles/file/movetika.pdf In PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/83749088796.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/7115000096.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/07f020f270a0774a8e43b3ad9822a918/32720753586.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/nujuzawigamuluxitopiju.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/sulamuboxirenu.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/22449418651.pdfIn PDF document text
    • http://rotang.net/userfiles/file/geroregorelurenewux.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e381cb54279---muladogawoworidobajasisex.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606c868254d94---36663054112.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/68816773543.pdfIn PDF document text
    • https://rais.bg/uploads/file/xexapuwixalapidomok.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1813e8b1fcb24300650cf81ba2cdc908/26271545351.pdfIn PDF document text
    • http://teifsepahan.com/files/file/46487478684.pdfIn PDF document text
    • http://schubert-hh.de/image/file/76606828938.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/4633332582.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/38617911497.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/warefopusetedunewo.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/kosexadidisutaxizado.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ba509e5035---podonekoxorilejum.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/woforemed.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100410def8bd---36454766517.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/687451f923b503c5e2509818d9836425/mudesuxivotamu.pdfIn PDF document text
    • http://mp-journal.com/media/file/2357081275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=arduino+programming+notebook+pdfPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A1 19324 bytes
SHA-256: 3a8438d680b11dfc9e8d12769e0e85b2245077388e3ec9fe2161d0d29cdeb1fc
font_01_sfnt_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 16836 bytes
SHA-256: 645820c595d4038498db028c8b5d80835908cfe6b43d33359db03e6d05944cee
font_02_sfnt_off00010ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12808 10940 bytes
SHA-256: 3f76521a46966e246527f4228a212c5982eb1420acc5a89f5eb722b67d5b7a9c

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