Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0d122546e435df…

MALICIOUS

PDF

72.0 KB Created: 2021-09-16 17:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 76c61e68a6ab88afb760aa2259fa39bb SHA-1: 5e5ef3743db0022c31e03689ebf64d42f51d8eb1 SHA-256: 9e0d122546e435dff50ff0ccf78488602c3da35836986fd0c615bf2daad602d6
176 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm and a callback phishing lure. The document's content, though heavily obfuscated, suggests a pretext for users to contact a provided phone number, aligning with tech support or billing scams. The presence of numerous links to potentially compromised WordPress sites and disposable hosting further supports a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://renetravel.ro/images/files/jubagizejevakugiwumexoxe.pdf In PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/84968277030.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/2u0vuurobu6vo1krioqotlp3ti/18339100908.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/pakijadokexivilizazaso.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/18536533111.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/barofujemusoxibitan.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/47909548465.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/54516913006.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/47244099306.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/kabiritemalefotutisulave.pdfIn PDF document text
    • https://nistd.in/userfiles/file/80315122158.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/22712255160.pdfIn PDF document text
    • https://duel.pl/userfiles/file/3600329213.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d3f55781b---89983433084.pdfIn PDF document text
    • http://denge.aero/upload/files/werizazarexuzenuku.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/paxogomekesekiroluxa.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/6129142588.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/33764665551.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/wadimidavafevas.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/18214597863.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/81923168089.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/34195035780.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210905051629.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/relagumujeke.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16141b5cc53d35---gopuxarukeboxanup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=instagram+message+recovery+apkPDF 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_off0000b699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB699 10800 bytes
SHA-256: dc995aee046223018682b9fc81b6fbd87a9d29f163db9eb1c946f09a9592539d
font_01_sfnt_off0000cf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 16692 bytes
SHA-256: 17600554859c148561dd149dc0bfe220d9867f4d6031eb07b38ed795fe2d02be
font_02_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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