Malicious PDF — malware analysis report

Static analysis result for SHA-256 30480a7ac4a97cb3…

MALICIOUS

PDF

91.4 KB Created: 2021-08-05 03:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f6c6b855592ed9ef1be58614b6e1a7d0 SHA-1: 3adbfa818c18274a836cc5e9c3bf01895b8dbc8f SHA-256: 30480a7ac4a97cb35221751a219e93754f908885290f297ce54194e464b4c689
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The document body is heavily obfuscated, but the presence of embedded JavaScript and a link farm structure suggests malicious intent. The SE_CALLBACK_LURE heuristic indicates the document likely prompts the user to call a phone number, a common tactic in callback phishing and tech support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://maxidmum.com/images/upload/fck/file/ragaruxonigokovus.pdf In PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/10494288778.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc647ba1db---38433119695.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/c6aod671hcecc9u693isvp55ou/81558349545.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/rfa9qah6ncoh3qc0bd0rqllhh9/wuvurowuli.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/2lsakv87hrpl1vcok6lldsl7lb/30868115924.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/kifutowag.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/polilimotado.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/61191135758.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/sphrjhkcdppvu112nabg60688g/55763539366.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/ketojusi.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/nigosusupa.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd24c673d4---30108755559.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa911e3a72---nipetebutosibogugunalepe.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c620f97d---35860172481.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/defev.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/52a3j1b4b81efvt59511adfm1c/sepewatanutegik.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/ruxakeja.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/44661282048.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/xomofixasotakoxugow.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/a895v9ur4fv3q6v500kf95t5ov/vigoxuturilozidagogagipov.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/gemafejuvebalutuvokobadew.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d275f1e61e93ae84e1027fdc682553d6/83762199735.pdfIn PDF document text
    • http://furniture83.com/upload/files/neguzomidegubikawam.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072666271d48---mubalosijulopoposijumuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+mortal+kombat+trilogy+pc+windows+7+64+bitPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 23240 bytes
SHA-256: 8fc92165c9d902488b6d4fdba412c52c0500bca136bc4ff944259acc98d95357
font_02_sfnt_off0001451a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451A 11452 bytes
SHA-256: c7028d01022e7f2c0351744a7044a8888909438b58b118d9dafd4821afdb58b3

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