Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3dad067e660fa3…

MALICIOUS

PDF

71.2 KB Created: 2021-08-28 10:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 99fd206cc41c94f5058404ef6dae20af SHA-1: bd54555b48e88e056ad637329c3f745dffd4c9fa SHA-256: 2f3dad067e660fa3d02201349ecb9bda225f8eed79ecc5b6e5e1d3232015f541
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://vyveva.eu/UserFiles/File/39826935908.pdf In PDF document text
    • http://metabolit-plus.ru/files/file/bisisawevixuf.pdfIn PDF document text
    • http://ropesadventure.com/d/files/69128955440.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/87612d5dae89f8a6a1f5eb5068119763/setemapedalebirugaz.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/vopipotuwoludojupamun.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d1f87b27e---lufugubixakuzukawupore.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073dcac1c618---rubumigilap.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/00cbe58742c32a7ba6df5fa9ba90216c/tumugusuxub.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/tupesexokejudo.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f18f232cc1---3355992216.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094e4db1740f---99651974945.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/didipuwafun.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/79927289901.pdfIn PDF document text
    • http://unseretochter.ch/images/file/lutafomudutujeven.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3eda102fc575a91424e577104e25a6e9/jezasiwap.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/1430787396.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/wajaletak.pdfIn PDF document text
    • http://anninh247.info/upload/files/62426613479.pdfIn PDF document text
    • https://medius.sk/userfiles/file/zafefomaturudawugunejefi.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/xaxabutiwixorowavomi.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/wagutumop.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/785214f99af15f8a56d1facfa14e8704/sumesurijifawegureze.pdfIn PDF document text
    • https://bem-sa.com/img/file/xijakawujakiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=spring+roll+rice+paper+friedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E5 10604 bytes
SHA-256: d49c42f444504f6903f5a410bf8dbba57b3a53d360b8b7e1235954391ac63a62
font_01_sfnt_off0000cfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEE 15460 bytes
SHA-256: 5f99554f948247f120f4dd170f66f38e5476ce6e5384524fd5af1b8b25ab68d8
font_02_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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