Malicious PDF — malware analysis report

Static analysis result for SHA-256 a013130cf176395e…

MALICIOUS

PDF

85.9 KB Created: 2021-06-30 11:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87785310daf5d47a4182e0196c2853e4 SHA-1: 8b5fa71c1984be0c70e5ecbec62886a5fc0704e9 SHA-256: a013130cf176395e1a419548a0f6ede0f760709835b92c059fc54a76a72248cf
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of multiple external URIs and a link farm heuristic strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/hbkk7ojbre97f35hq6jq58ci85/giloniwewelavapukar.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beeb56a0cda---zifofetozewarala.pdf
    • http://asbufestival.com/uploads/FCK_files/file/nutoz.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/07cd355f207990cb28e48d91f52c2843/bejagefunekade.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/a0c802d2ee6c29391167fd4d6f36c3b6/47928971618.pdf
    • http://netinflux.net/userfiles/file/31641084650.pdf
    • http://ranaghatpchsschool.org/userfiles/file/rurudevusebimunavoraka.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/q4hgpqvkg4sdp7egngkv83rp9d/54965960009.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094747c5bc49---tifowidewozuzoxogizani.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a06f0b5cdb36ecadb71c6e3e88272f4e/50451207277.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf98b9ba4a---betusupevu.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/57d2f7181e22002f42873c5343255b03/voroseka.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/fejakewepukix.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/18312d7470dad9c937ffa01a7a3e01a3/9679387623.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/4ad615f765ab49ac383a652febc144a4/75915144496.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/cbovmv2kp5qpqk0110v6e10l2a/wuwozewonuwagopakamafa.pdf
    • http://antifftech.com/uploadfile/file///2021051914022458.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6421c70c9---9426740035.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dcef7c2aa---xunurepagufizexegero.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/56fe2f0300686a1b83e29ee785e4276e/mefimu.pdf
    • http://goref.ru/files/file/89132495146.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a58ba651d---55783539874.pdf
    • https://t2sc.me/userfiles/jetutesuzofavazojajemefam.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f9bc6af2---tojekasojar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=temporary+card+number+generator
    • 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_off0000ec5c.bin
ca13d8558069fb121f059817d506a6c03f8de244955aa5c7f14ae2a2a6b4156f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 17224 bytes
font_01_sfnt_off00011971.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11971 16792 bytes
font_02_sfnt_off00013188.bin
aa651e58fe158e376500cfa379e1cfe7fc17e7335cdd78847c8e70e79ad260a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 10868 bytes

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