Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b14b002536cfc6c…

MALICIOUS

PDF

83.3 KB Created: 2021-09-16 07:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c174d283f363a34a80984509bb15dd64 SHA-1: d32d2e60a94629b5d4f0beb5d2abafbceb433355 SHA-256: 0b14b002536cfc6c474cd384069adf9caa716fa3449b1bd51daf60dd522d74a0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'SE_CALLBACK_LURE' suggest the document is designed to trick the user into interacting with a malicious link or potentially a phone number for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://medvor.ru/uplcv?utm_term=emergency+alert+app+android PDF link annotation
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/6g104cqgt7lqo846jb8c1pq296/99283695174.pdfIn PDF document text
    • https://finliz.lt/i/File/vejitolizolabaseje.pdfIn PDF document text
    • http://terrietanaka.com/library/files/pixura.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/gisanasog.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/dasexugapaxosidew.pdfIn PDF document text
    • https://kawanmto.info/contents/files/maguduvabajutixewolidap.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210905161719.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/zotebiropemifilemenemekil.pdfIn PDF document text
    • https://protum.se/file/39433394405.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d4a691f4237025b60b1dd5dff4321872/54698544090.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/sagubinezarose.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/kurezo.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/91604241669.pdfIn PDF document text
    • https://artenika.pl/fck/file/laxesusafijexokala.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/42944501534.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/94344564118.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614213590018a---86749064089.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/dfd3d99076fc1e9b510675a211069c46/zewevotozi.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/17083950785.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/xivedipewoku.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/96673841136.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/dc61b0c7398f028b05304ad0e20d6cc4/sogowuwopibijuj.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/tafigobozonatuxo.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/42099282707.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/89587706304.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/50095052712.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://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_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 10784 bytes
SHA-256: b030a9ddf57d35bed687519d3ac808ae8be8c8ebbce3dc970178224c4f84f543
font_02_sfnt_off000113b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 17084 bytes
SHA-256: f570a7c0bdcdcf20c720cdf522546f898caa02f8f9d584c433e5f77bb1d0c735

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