Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feb4785dd042482…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 03:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be6b54e8ffd5a714dc3907cf485538cc SHA-1: 90e1e6ab32cb482f38d74dac17c850b2a3bc7cf1 SHA-256: 0feb4785dd0424823d24a99725e231ea931e613e40bccd44cc7515dd2791c200
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document's structure suggests it is a link farm hosted on compromised CMS upload directories, likely intended to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document attempts to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607022b405b40---genutosimu.pdf In PDF document text
    • https://glbtrader.com/userfiles/file/budujewadobu.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/7019cab615e19b1d060e38c722ec6d9a/gavorobodifezixebojapulef.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4edef0ec5---jodamabolamitegini.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/13282318382.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/16313156200.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/1094a8119fa190f38ec2140d39285e25/72549992915.pdfIn PDF document text
    • https://clove7.com/userfiles/file/45130622146.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/54347982096.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/dedixal.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/71568653523.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/73519968355.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/xorejenifudusivawinuliti.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/manode.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/sanimexaneliro.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/45053924124.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cecc9cd718---5191805873.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/424981860aecb72cb5e12eeba833afd6/71924409138.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/88632a7729a02f320228eff5fd56052b/24928057439.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/tunere.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608720a70fc5d---17682162632.pdfIn PDF document text
    • http://skisun.it/userfiles/files/gazukalowowud.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/57614844576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=razer+hammerhead+bluetooth+manualPDF 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_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 10600 bytes
SHA-256: 3f8dd130744ed8530950d24f38741f9a9e2da058b53e55bfc54544a2828476c2
font_01_sfnt_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 18272 bytes
SHA-256: edfe0df8e529753b0fec3d97a5622e9f30bf13c77684b036ba121fb277d3bb24
font_02_sfnt_off00012e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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