Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd822845d728823…

MALICIOUS

PDF

93.4 KB Created: 2021-06-25 20:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc732964913af8566c87517ec433f63d SHA-1: 311a8c50a7f59d9e7fb8c87724acaa8f5adadb38 SHA-256: 3cd822845d72882316233b4d597426ff4da6b028db781beb74ef89cdbc11c0ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm on compromised CMS uploads, with numerous distinct hosts and embedded URLs. While no scripts were directly extracted, the nature of the link farm suggests it is part of a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/03245eec0e16c7de33a925495fcbdfd6/47461759642.pdf
    • http://goldway.jp/upload/board/file/nemebipuwomutumexapoxot.pdf
    • http://mini-garden.ru/userfiles/file/35632663230.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a6beb04f709---jafowunugugo.pdf
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/fcbd05094345c165564baac4d94ec8ac/70992482362.pdf
    • https://alarrabnews.com/images/content/content/file/temegijolatajufusatal.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c2ac6c3bc---72366575643.pdf
    • https://arerp.kr/data/file///51704501254.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5448b01af0---37033237677.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/f1bb8e016e428152798e14582850fd4b/12911992033.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/792223cc859cfd523bc847e3edb0b7c8/xesemoluzikoro.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bp19ispb6hj85u2m720qqs6lb4/12527410510.pdf
    • https://lanhcongnghiepthinhphat.com/upload/files/xewawaluwerofe.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/0568865c2c6612e8a4da558de59eb5c2/xinarelefevosidexi.pdf
    • https://liur-krd.ru/userfiles/file/vefag.pdf
    • https://aashianarealty.com/file/60805898194.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4993f3193a666efe4791b20a62c812c3/2957822682.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f4e2e5d5c065c41ccf947667e25d184c/12002287089.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7df97cd32---sikulidarobitasovine.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/abe6fd076669e2fd39a79ae6e98423ae/wiwalifupajuped.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090815f324ce---18633982252.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607fef3607108---rolabitoves.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088e9bd5f75b---xidoboviboriwimi.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc43b4ce93---2225516784.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/05o0jnc2vh75ifqsgo3l92rdp2/nefapizageda.pdf
    • http://ridendo.cz/files/file/dolatojegu.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/220664ebe766b9f056a10ecfba09e718/35702182596.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=key+stages+of+conflict+continuum
    • 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_off00010bc0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC0 16792 bytes
font_01_sfnt_off000123d2.bin
dd996764f834c0b31d4b91d87c604e231418fdb2d8d47c8dba713df870dd1c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D2 16792 bytes
font_02_sfnt_off00014f34.bin
77e9ca670e3b84b7e9c9474eb7ca7ce8761f98d912ad19febe62f1414b945e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F34 10784 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.