Malicious PDF — malware analysis report

Static analysis result for SHA-256 0127102aeeafacfb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-09 05:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a8989e02ba928149f31b7660d749c358 SHA-1: cde54ee9ddeaeb840d83a085744147df10d42a3d SHA-256: 0127102aeeafacfb87978c49fa392ce63e6a3d05be93e1cbb0970eec73d4779b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users into visiting potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=how+do+i+transfer+everything+to+my+new+android+tablet PDF link annotation
    • http://jamalcar.com/userfiles/file/zixopodaluroxibesebajo.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394658cc180---wofosipogo.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/115444a8c63d5cda761ee520cfde3d1c/zozigugapezopida.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/21420140493.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/figumegikeruput.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/90146230090.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mopopuwevuzazibelo.pdfIn PDF document text
    • http://i-physiology.ru/upload/debusidifesawedifol.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/jutetujanota.pdfIn PDF document text
    • http://3q1p.com/upload/file/210901143205402626cvfu586r0d7z.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/39075090323.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/terasa.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210901_165326_1988.pdfIn PDF document text
    • https://normec-cm.com/ckfinder/userfiles/files/5249278085.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdc424eff9---gorogovodevogamejetamum.pdfIn PDF document text
    • http://standardamulet.com/files/files/57226469905.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/93053530068.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/95383999763.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/livov.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/fepenulowetise.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/mepazu.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/96958236043.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bf1d8864c---44928042511.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_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 18020 bytes
SHA-256: a9682fe50887c1dfa070b4c5ae438190b716e465064a2263bee48852b7174c47
font_01_sfnt_off00010c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001247d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247D 11196 bytes
SHA-256: 0e7bc99759a7b704d2cf2aea229a6906e05c628752fd57baa858fec4b8d8a90a

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