Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ed63702deb48ae…

MALICIOUS

PDF

94.6 KB Created: 2021-06-29 01:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f64cc5ab1ff8bce33e6e6b5fc846334 SHA-1: 7e5383fca7a5a645d6c6f12a06e7ed017a1e5295 SHA-256: 68ed63702deb48ae3ea98afb706cd82b34770e813b2f260f52e727bf93f0791f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. The presence of multiple distinct hosts and the use of disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070951dd2e7e---wabelaramatutugumowupe.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45b9d0b1f2---puwuzirumuku.pdf
    • https://aimara-bg.com/userfiles/file/zadilimugux.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ht7lt0qeas4ccsl2qh9nur46d7/vimaxekijobatatejetogag.pdf
    • https://aquafilling.com/userfiles/file/69307675790.pdf
    • https://tedvandergulik.nl/userimages/file/15859719020.pdf
    • http://vinamex.info/uploads/news_file/55227273238.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2dc4b3f1e---6730213973.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/eab30c3718f09169b99b6df0b62d1355/87603277278.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/nhit3v2kkdn5aiha5p65jn9c6c/43778586560.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9535807f6---16670478839.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af3bbea4012---rivufusekuzod.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607391059884e---84294991679.pdf
    • http://bephoangdung.vn/uploads/ckfinder/files/75662068603.pdf
    • https://summit-christian-academy.com/scauserfiles/files/22406497101.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ddc01ab98c936b94bb628eaa4935e014/58975145767.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4f4a90b4---75227072891.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/4fc7b32ab71a0d452d5ac520c0d17a91/70874204610.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077e343e7722---23127065676.pdf
    • http://fairway.cc/images/blog//file/losox.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd994e56bc---tabav.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0b55af068---73102939139.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/15240304207.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/26cdc97fbd4390a5ca6e38d24a4d9eb3/tazidanesiv.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9cb7a4e49de65eb263ad525e0df34a7f/fiwos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=scorpions+in+the+wind
    • 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_off00010beb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 16792 bytes
font_01_sfnt_off000123fd.bin
b440845eecf8dc4e9f282cb503c8c4919c6f3c3ba40c69a6e49b8139cb90fdb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123FD 19728 bytes
font_02_sfnt_off0001554d.bin
aaa4cf5c086f9f77cf35a6da370a051e33acd309f11a4e7349eb87993f456731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1554D 10564 bytes

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