Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00ff0571141885…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 00:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a17b432d25db94874254d6f72bcefa5c SHA-1: 2c003001cf29dab7551d27f1462b454ce375169c SHA-256: 1a00ff0571141885589f790df8e017c60b057882965201a33b04514f08af609e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mynigaoe.com/upload/file/20210613051258.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb82aa6ba3---duxopati.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/dvi3e11thdep74t7u4fl9f1bto/38253796008.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/i525f9440iludh8mris1ibbpa4/9466962960.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2b461660956a312493dbde49ebad29dc/86461921556.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160898ba03fd9f---61764583490.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3gej6egibf8etmtam32fu02p31/womiwazofujofedeburik.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/90663297674d8c81ef33aaba967c58d2/kikitusufepezonofo.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/8f75ed702bf565e07e4a7f5e856b0bb7/kasedetaxedorumisogu.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b356d8107b4---33826060114.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a748afb3863---55514647805.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094772d3b141---gorilisuxobudogen.pdf
    • https://daquin-ferriere.fr/userfiles/file/fanararivaguvamat.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/6a8o389blj6d0spnemfip426q5/sufunitupejuverokuwid.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/5smlrttp1qkejvo884tdrrcfvl/danukezanivikukivovid.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/krmvg9tnd9t3e5gqevoa6ibmg4/buwigodukukinibeneba.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/uraqrh2ifm0jvn31h6mj83cm76/37244080518.pdf
    • https://scriptdd.com/_file/file/36791551473.pdf
    • https://miaousland.fr/ckfinder/userfiles/files/wamimanogopuro.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c7e7aa591872dd546923ba7b990e4b0b/98570025315.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/jasaja.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a60d40b2d7---mizufep.pdf
    • https://bodymart.in/ckfinder/userfiles/files/xabikilijilonapirutut.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/9936000362.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fulfilled+prophecy+meaning
    • 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_off0000ea9a.bin
98599d3bc1d4ae012effd34d0a9e666ce75494bc9b3e58255a85501a98e9cbaf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 10992 bytes
font_01_sfnt_off000103a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 16792 bytes
font_02_sfnt_off00011bbb.bin
252590d3761d8f07c4fe38b76f18693e304a240de04fe1d99d7dec20764050d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBB 16688 bytes