Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9518b285658073d…

MALICIOUS

PDF

86.5 KB Created: 2021-07-02 18:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1d8776f8c2c22bcadde2f38ea482b4d SHA-1: 5ef6ea6da802cd9edf2b1d194d61b0229aedc765 SHA-256: f9518b285658073d5e7f1e54285d3834a19a63206feb357a74dc751902802537
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. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. This pattern suggests an attempt to distribute malware or conduct phishing attacks by redirecting users to malicious content.

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 http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e04718ab8---sobakefesidafofogir.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a37e6d8a45---86901678588.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609611e1f13b7---81714328493.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66a499de8f---vupaburavekokurariz.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a43977c60b6---baxevodemenifokujugozix.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab529a6e5ca---pabatir.pdf
    • http://brandnewgoods.net/userfiles/file/50343700717.pdf
    • http://mim2010.ru/userfiles/file/mosuvonigab.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb6a8b5a66---10609188919.pdf
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/gezanasetiba.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/0d1685740367dbd3ceff0c4841cbd8d7/44988565174.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/k01jva2k4jvalpe0e1j6v54t88/77314975508.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608663132b648---fipofimijunokegigan.pdf
    • https://actor-conseil.com/files/file/71420740391.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d52503b42---pojasorosorop.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/40d088e2262a2b171813dd0dab205abe/mokifujidejokabuwo.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afd60315d34---fowowifuvipatop.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097451342f6f---37539663970.pdf
    • http://albino-pitti.com/pub_img/file/sawelisonabigenilatiwusi.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160853b03c12ff---sedurulatazobavaj.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/20f9c0109250799536a5ab186b17f72d/xuluxela.pdf
    • http://aweibel.com/Photo/file/daxilegeduku.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ec8e7f67d58c805a7ab5996c5878a328/numaxirunoropi.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c36e151a763---13498697851.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=nonfiction+reading+test+mongooses+answers
    • 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_off0000f1c0.bin
0a02d16cb3e83ad817fb6e9c837a674fd7163b5bfe66f5af0061843a99f3faad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16204 bytes
font_01_sfnt_off00011b7c.bin
cd9ccdbec17aafbc3c9ab05720c656abfd3865add4b579837ea49958150c7f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7C 10836 bytes
font_02_sfnt_off0001345e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1345E 16792 bytes

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