Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3c4f906bd75575…

MALICIOUS

PDF

96.0 KB Created: 2021-06-26 21:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e034fd4b3992aa78261edb96300412c SHA-1: 606af59dce4d1e6744fb49b19b9542fd71efc152 SHA-256: 7a3c4f906bd7557510b29463467e291bbab1ed0d16bdeb23dcef83e23235f57c
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are the primary indicators of compromise, leading to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c47b8d92988---nipuwemuwigetuxu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eea57ccd51---37868966163.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/30f7291102004e62ff6b642bc6bab88d/kogufowojowaxibufaja.pdf
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/merofajix.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/dd1ff41d48e4aac453d60bf59faa63fa/xonamajezatopukokolorus.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608191847750a---61457395142.pdf
    • https://waroproject.com/file/rurizivukelowube.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088470e02512---10519107516.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dd57547a0---37314207140.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/c980e16282f1a45699c77ce49049f1e7/19685429739.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5af9ee0c---natajoposimuxiseza.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdc56f09f7---bijusegadefudejum.pdf
    • http://hysansam.com/fckeditor/userfiles/image/josibad.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/162e2fi12bggqbnok9i04mh26r/separujades.pdf
    • http://isgsrl.it/images/file/detazinepidaw.pdf
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/doxujexum.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c16e1308db03f677f57244caa1a9a66d/68742626045.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7716bdee8a8470bad6952694fcc748e7/lenexisaxufajijobuwoxo.pdf
    • https://egyiksem.hu/uploads/file/81155359268.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a83f30abe32---napire.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608361ffdd1d1---66341647760.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/28c1fc72ee72f4183c772996c160fd43/jatomupegalifewa.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/fc46ce815f6c4c4bc9f6984db7917fca/xikika.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609886fecb926---kaneguzarol.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4f928dee86ff25c46c7333d861fe193a/zipaxipigidemifasit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mastering+astral+projection
    • 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_off00011739.bin
2453ba2d2fb8ca7653ac63e4f49738c474ab215130185c34bc9dfe202f2733a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 16708 bytes
font_01_sfnt_off0001425a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1425A 16792 bytes
font_02_sfnt_off00015a71.bin
c68b8748b31774544c72afe84b4f0f99f310d62a787a2d72338369f2523d3f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A71 10672 bytes

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