Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0c680886863f06…

MALICIOUS

PDF

104.1 KB Created: 2021-06-28 23:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b05a7363c551657d673b49b15993ee15 SHA-1: 07a1953545d76fdc42ea3c3795611375156f31f9 SHA-256: 8e0c680886863f064c716c73d476ecd7d130ab19bd1a024585d7d53f43ddccc8
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://toshiba-center.ru/uploads/files/gidanamelonumemomotupa.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b47ff4239b1acfd486453e1fb84cacef/lonebosapiguzel.pdf
    • http://supermarketdv.ru/files/file/73199692700.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/i8fk44ifr6reabdj6214ib82r6/baduxipomuzekerotaxepuzi.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff876d0253---70793545190.pdf
    • http://dmhu.eu/uploads/uplib/file/dowaganelejovesiw.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba881856f53---gexixukowiremupe.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160890742895ff---33752085454.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/5c4406f8fd03f17b5ef825d5cd42fe99/godales.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb21c7e9a0---70522441948.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/dec2b2f333c31a3e04ed81df730fedb4/96836963409.pdf
    • http://thietkewebbacninh.com/webroot/img/files/kalinazuto.pdf
    • http://ahkjt.com/upfile/file/98065930082.pdf
    • http://piazzademarini3ge.com/userfiles/files/8446965531.pdf
    • http://studiocommercialedelpiano.it/userfiles/files/29755667026.pdf
    • http://bet-balance.com/userfiles/file/pidutul.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0334d6f45---37180398861.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608364e2b1424---70697275851.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f24fe17bc---65123864384.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/68519591761.pdf
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/69808623812.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160758c617e3f7---10843444037.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b67291bf16e---mureribubolanesetosunukam.pdf
    • https://privatecambodiatour.com/userfiles/file/feriraweras.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/r83p7gavfpsolkqjsd75ngqnn8/pewaxusowitetubanokun.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+find+0+of+polynomial
    • 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_off0001328e.bin
cf967f5021a695e8f8f9b26133bc0e132f283c6b01f29d66cc21facd16bfe00d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1328E 18768 bytes
font_01_sfnt_off000162fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x162FC 16792 bytes
font_02_sfnt_off00017b13.bin
35c97aa956c73f6a22ded111b9f25b0dcde0f00b8ce0d71cc51adbb296ecc72f
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B13 10572 bytes