Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f619f6dc0bea06…

MALICIOUS

PDF

86.0 KB Created: 2021-08-06 23:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bfef5039a3f3dbe9160ad31aca07e81 SHA-1: bd9b22451d476392654265fdffc09a918a7ae0d7 SHA-256: 97f619f6dc0bea06d6c47f831b5f1f4653e4aa9edc210ef3941fb6224869682f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish for credentials. The presence of a Google feedproxy URL, though marked benign, indicates a potential redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076134bc27d0---27688690914.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c36a1fcaf---velala.pdf
    • http://charlotteellisscholarship.com/clients/a/a5/a56794a54ce3a7e2a8fdc514f00cf952/File/zivovugu.pdf
    • http://studioboscono.it/userfiles/files/77714474265.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608602c537230---japaropulebanutosax.pdf
    • https://commonwealthsportsawards.com/userfiles/file/regidogekubigigo.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fd2d0a365---zexegowuxowime.pdf
    • http://randoquad72.fr/userfiles/file/lutosaverumosobupoki.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4f7cba4b---sarijosizafadifa.pdf
    • http://qca.ch/userfiles/file/jiwufiselakupome.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/14kg2mr2iirar6r298q2urnjfa/fakufowikunopidawe.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16106c85f4c7d8---32009327323.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c12c8975160---17822767047.pdf
    • http://brenna-ski.pl/userfiles/file/tarekiwefejimap.pdf
    • http://ducthanhtam.com/uploads/userfiles/file/27688743236.pdf
    • http://metabolit-plus.ru/files/file/jevaxiwegoregiz.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb5622cbf0---jusijuxekujuloxolibop.pdf
    • https://ajambary.com/userfiles/file/fagumadixojerejuxuxedan.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160939cde49f9d---noxabepugawalun.pdf
    • http://twfindia.in/userfiles/files/nonupododemarugume.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608a991cc4ebd---wegepuzol.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+install+whatsapp+plus+on+iphone+without+jailbreak
    • 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_off0000eb00.bin
a3f8250bc46b1ee2749b073244b7de6cd1cf74c69eb7a098ab9daaf9e4cf1176
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 10888 bytes
font_01_sfnt_off000103df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 16792 bytes
font_02_sfnt_off00011bf1.bin
4d12a32b8179be162b0ffc0cb48628689bbfcd9b5bb6f66089654f582e7f6343
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF1 17288 bytes