Malicious PDF — malware analysis report

Static analysis result for SHA-256 01652052a8b0bbe1…

MALICIOUS

PDF

110.4 KB Created: 2021-06-27 12:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18dfc5a72c43a21e67a7cd4021485484 SHA-1: 10c589cc0943e36d3e42474f5ef71614da493a35 SHA-256: 01652052a8b0bbe1b695c49adfd18373b10abf503bf5bf6234fc8fc9affd6140
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable domains, designed to trick users into downloading a malicious PDF. The presence of PDF_URI and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a phishing and malware distribution attempt. No scripts were extracted, but the structure suggests a lure for a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://aarogyamedico.com/userfiles/file/woninadezukalitexebew.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/cc5f5211e0ac792b1d6b1cd40e7ba3ce/80826141821.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/nj8eiaqhc6952v1aedth1s5b71/kigijogigiveberexepivag.pdf
    • https://vivekanandbawwa.com/userfiles/file/80946416797.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ee9l38kdlshq7utehb48b3lfvs/dawawakaxowusixazavufur.pdf
    • https://dialogueinpraxis.net/files/docs/38570314176.pdf
    • http://skikk.be/app/webroot/files/userfiles/files/80937945660.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5675f427---87014150818.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f8de84b9---35481292936.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c794b684bf---61627249004.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608310c78fd05---jizanowerezagetu.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04e84c07c3---bumel.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/360061957bc37beb80c1a72a5c4e1973/nemololidojipa.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813360f3394---jekimofifililaxosoj.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091bb0770953---67529997427.pdf
    • http://morgancountyoh.com/userimages/68130162711.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/037d428871699f51e08927b1ab114d9e/95895104577.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/0n1n99v9h9483dnh6sjee8l6uu/70667905958.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b6e5e6a7---90546473777.pdf
    • http://jrpst.pl/userfiles/file/56619403842.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b463681fb32---88051490744.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/149020464149a0c0300db64cd3eb7177/relegiratowi.pdf
    • https://faresaldabbous.com/uploads/files/mitan.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=list+of+tom+and+jerry+characters
    • 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_off00014d7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7D 16792 bytes
font_01_sfnt_off0001658f.bin
9eb97f2c7370d646b3ce8a8ad581bc9758f69de7d93a446a062853b9f4365991
pdf-font-stream PDF embedded font (sfnt) at offset 0x1658F 17784 bytes
font_02_sfnt_off00019366.bin
881c67d5e76006af01657ca6841daf7d67d5e1ce546e7b6432baccfc894b711e
pdf-font-stream PDF embedded font (sfnt) at offset 0x19366 10896 bytes