Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fbeaea39c1c02e0…

MALICIOUS

PDF

83.4 KB Created: 2021-08-16 00:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7359fa103cb0d43693ba50004126b2b0 SHA-1: b4eb25b9adb146a6194fb8cc5b1feb7f7be0deb1 SHA-256: 7fbeaea39c1c02e010c4d178195fe46f6b4f64acf575ddcdf9c7a852926b5df1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple links to potentially compromised websites, indicating an attempt to deliver a malicious payload or redirect the user to a phishing site. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document is designed to trick the user into calling a fraudulent phone number, consistent with tech-support scams or billing fraud. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/3cbv1rrtjsiaecdpnnn4ls8s9g/xuzuzined.pdf In PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/worozebolixone.pdfIn PDF document text
    • http://www.provinces.cmcgeneralate.org/files/js/ckfinder/userfiles/files/lomotasofurugojibowopari.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/88616086840.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/32132923435.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160893d3146e2e---nabivisobijeteranakivukix.pdfIn PDF document text
    • https://umartravel.com/files/jafuwakoforov.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978793a4935---31704096315.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d0815f73247---semozuzavemuzijogosud.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/16821077743.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46b5cf0d98---53729967797.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/dexudojif.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a85a56080ccba381bac2cfaa5a78a12/91120401038.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f57929df3d3---42584804850.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e16604f193---82183215046.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/vagetokafutemofenabik.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078aa2a7f5ac---fakalopiwibexogirunuvipi.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/kamit.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/15139849802.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/88051230807.pdfIn PDF document text
    • https://bczenekar.hu/files/file/kiroregojoboxi.pdfIn PDF document text
    • http://klefmarken.se/upload/file/jutoxanejibibunin.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b971430bc82---loperipojikixubudezasuxiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+do+i+view+my+bunker+hill+security+cameras+on+my+iphonePDF 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_off0000e032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE032 11368 bytes
SHA-256: e925e2db54b1fc35f3d2f1432540d538db8830ea46d8c752b6cb073211699db5
font_01_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 16188 bytes
SHA-256: 560c088a58ec348924be8761c04b6914dc302e0b998af97644af5eaecaa494f2
font_02_sfnt_off00012443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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