Malicious PDF — malware analysis report

Static analysis result for SHA-256 65fc3c2a46a26676…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 10:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a05f385d45c94ae8eca2f0f3452a33d1 SHA-1: 1d2541fecd59f83ad81930fdbbebf04bd3e9a691 SHA-256: 65fc3c2a46a266764448e372f6385c79afdbdf13aa9af18e8dbfe164ceffa1ba
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, suggests it's designed to redirect users to malicious sites. The document body is heavily obfuscated, but the heuristics point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://allytemp.ru/uplcv?utm_term=one+piece+stampede+filme+online PDF link annotation
    • http://buyo-g.net/userfiles/file/54133754320.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/69e004a669f454db187f298bfe628598/23013808815.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/40e8ca1a6d89f06da2db3057e2d78a23/jajeriwuzitopuwiru.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/51026297300.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/1088787601.pdfIn PDF document text
    • https://mauspro.net/upload/files/lerizibirut.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/69892490284.pdfIn PDF document text
    • http://ropesadventure.com/d/files/jeloguxuvasubedapesav.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/20770312172.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/gulaw.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/65060326388.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/boxuzexaxivesubogove.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/80725134229.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/suposutidi.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/79428050672.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/38339245866.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/20856846634.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/pudoroxevupurojutur.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138faf5243b0---fasutonax.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210901145016.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/34894596690.pdfIn PDF document text
    • http://rilta.net/userfiles/files/90915731654.pdfIn PDF document text
    • http://aven.su/userfiles/file/bukajuteri.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134c06665536---nomelesozejezirikunaril.pdfIn PDF document text
    • 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://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_off0000d34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 10708 bytes
SHA-256: 49b59b0fd2e0892fa7b4f9099b759ce37983d96084ddd2790f3ab4d67df172c7
font_01_sfnt_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 21696 bytes
SHA-256: f095a1c052ab1bd1310c31267e907356df5862e1f1fe1bea77cd23ee2745b60a

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