Malicious PDF — malware analysis report

Static analysis result for SHA-256 1318a69b06292d38…

MALICIOUS

PDF

74.0 KB Created: 2021-09-07 10:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a3673862bb228b06b65744346c382bd SHA-1: 9d6816278d41ab35af8bfaedd26da621cf182af1 SHA-256: 1318a69b06292d38a6e9878449130a4a0d05ecca943ccbae43384916d5d3fe11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are associated with compromised CMS uploads. The primary purpose appears to be directing users to potentially harmful external sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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=lcp+380+manual+safety
    • http://mygotour.com/FileData/ckfinder/files/20210613_CBA5558185418075.pdf
    • http://gurukripapublicschool.com/userfiles/file/waxipefapel.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160f018e9ea713---rokegafoxirotido.pdf
    • https://davaocarrental.com/images/file/donobexuxurafewagixa.pdf
    • https://eslms.com/userfiles/file/24122269112.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/178d87723b50aa37137c031a16fc0bdc/17671389318.pdf
    • https://brianhigbielaw.com/UserFiles/file/73320766179.pdf
    • http://antifftech.com/uploadfile/file///2021050507265136.pdf
    • http://bjerkelunden.org/content/files/userfiles/file///boneporene.pdf
    • https://lapalettedesarts.fr/gestion/file/rabososefitibujevik.pdf
    • https://bushregenerators.biz/userfiles/files/62907593616.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094668feadb6---36133248808.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612173ff3df05---75134243118.pdf
    • https://chsins.tw/uploads//files/202108131006416964.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab364d155c0---namezobubow.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075567a32dcf---24119796010.pdf
    • http://parkhigh65.com/clients/4970/File/82628630748.pdf
    • https://doluhosting.com/calisma2/files/uploads/jonagojade.pdf
    • http://folientastaturen.pl/_data/file/fiwujiromigiriwurusa.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099519dc0021---23193796827.pdf
    • https://serka.com/serka/upload/files/9849332257.pdf
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pubafapevugezudo.pdf
    • http://fecirturizm.com/resimler/files/70398094238.pdf
    • http://ed-web.cz/userfilesfile/jitagavi.pdf
    • http://newtrichur.com/userfiles/file/76791641266.pdf
    • http://adaviestransportltd.com/userfiles/file/pusolajexowojida.pdf
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/38413258872.pdf
    • 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_off0000bd41.bin
c589e850bff0bff6bb01189b977adc64b722235a432d7d14afcb05e84d442f39
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD41 11004 bytes
font_01_sfnt_off0000d6ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 16792 bytes
font_02_sfnt_off0000eefc.bin
0f8479e22702cea912ac317782270f966f504f0a7366172039cf98cd2258c654
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 16996 bytes