Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b096f3b06600059…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 19:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ecf8668eb93ed1b658368e553e943007 SHA-1: 507d113c068e379f407109192b17fe08f17b9508 SHA-256: 9b096f3b06600059e26d04bae5024be30fa63969bab16ee32815157a60e70421
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to other PDF files hosted on compromised websites, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver further malware or phish credentials. The presence of a callback lure heuristic further supports a phishing or scam context.

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.
  • 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://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/mufuwosir.pdf In PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331dce721f1---vezuda.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/bodavijitowuwalajapavu.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109080458283895.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/75635152051.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/54957515496.pdfIn PDF document text
    • http://autovoda.ru/upload/files/zotarezuvokorulizexuxu.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/69178369253.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f00d9608e37e0668b0ebe828b437376c/jilodof.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/20262451931.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/xogikizawajumuzekepi.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210906_2AF3FF4D93B68832.pdfIn PDF document text
    • http://roleco.pl/data/aktualnosci_imgs/file/finagewilifoganaxa.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/68736256351.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/93413425683.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/87473599431.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/mewemepubusesepifono.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131cfdd2d132---25288348157.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/kilagaloses.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/pubigefejogu.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b8a84d488---12727163587.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/fadimukabunu.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/56213734637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=big+rig+racing+appPDF 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://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_off0000d8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 18332 bytes
SHA-256: 4fdc1a318851b80ceee43b4acb110152753592b1358c76037af232b544e22bd4
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 10040 bytes
SHA-256: ffa2aca9a10ff5edcf42273349001b2de1ec42bbecd7e0cdd8b8fb40d7c65471
font_02_sfnt_off00011e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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