Malicious PDF — malware analysis report

Static analysis result for SHA-256 219f22cef5ee6f04…

MALICIOUS

PDF

89.6 KB Created: 2021-07-04 17:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3c9a98e55fdeba5ae7571e67f3a54c1 SHA-1: 251839bd6d318120f7c88facfa403d791d3bc831 SHA-256: 219f22cef5ee6f04c6326cd7c00cfd8088a6de8ec87d1e1f1754695970165233
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution vehicle. The file functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary attack pattern involves luring users to click these links, potentially leading to further compromise or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://medicentrumnz.eu/medicentrum/files/file/75292578937.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/r4lh4s8q5smceddbg1hbjeahl5/joper.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1a5ad9ab9c4c469fec4a68003b4801ca/37290486876.pdf
    • http://vanillasky-ch.com/images/files/jizobizosodesuwejutubiji.pdf
    • http://emeat.ru/var/files/42043474745.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/5045a2b8d33b2a48356ad7832987fec8/leremeveratawopekodebu.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609e003caf8dd---82530350678.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/f4081328e8b780c9d0d93b1710c4a57d/43888183166.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aefd2e8033e---riroketizuvor.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/3955266e96172936079fe198f536ce9d/pefitofojizaw.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/fisusupavadut.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d0093e7e48be367a12c71fa6389e754f/63893229274.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/95d0ea9a8002c71156daa89c332ec2a6/20114187085.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d28fcbb533---69576576003.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8851466589---99702937599.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ae55ec8ee13cb141376ccbeb950c7e80/8666930902.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090e15a29a6f---sokorirovareworeviwe.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb2e307fd9---xumikewemelodap.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/pilojuvuze.pdf
    • http://jonkmp.nl/img/cms/file/19614270200.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/konujurupufun.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6jg2epoc7uo40t07eajf38e7g2/ramepum.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775e1f3bc7b---jowatudodulaxosu.pdf
    • http://randalljroutson.com/clients/44711/File/pudokobokabonokakujir.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16072438a63446---36156032500.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=tighter+or+more+tight
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f021.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 16792 bytes
font_01_sfnt_off00010838.bin
a9263702f4a644fd68177e5c7e6ac6e2327782234afe8e068662df0306a148af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 10036 bytes
font_02_sfnt_off00011e84.bin
0fb5017fd2ab8285a183f07be96944d7e46c445fe97b68750c91f5d66a99290b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 22372 bytes

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