Malicious PDF — malware analysis report

Static analysis result for SHA-256 782799834c996141…

MALICIOUS

PDF

81.4 KB Created: 2021-09-15 18:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: db293400168c0557feefea259dd42559 SHA-1: 08f43bafe457613279de8329704cee546dc3d0a4 SHA-256: 782799834c996141df801f7a579ca101c726c706c9ae328d481f47a1cf93a6b8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous embedded URLs pointing to compromised websites and link farms. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam pretext, although the document body itself is heavily obfuscated and unreadable. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://laborke.ru/uplcv?utm_term=watch+the+defiant+ones+online+free PDF link annotation
    • http://kanchanaspa.com/ckfinder/userfiles/files/41146148819.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbf0422f23---79016298447.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/461ca0ef9575f3d6a63980788ee5a444/kunusojuxosufixa.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/radoli.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16136fe209c425---40973970114.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mujaxitelegixadimu.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/pukefafowumomokujejexi.pdfIn PDF document text
    • http://lagrupacio.cat/file/femizaxawerejezafasoda.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/jabojuzazasojigiz.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/soximezugipaguxejuxorujez.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/lezojurogezopomeb.pdfIn PDF document text
    • http://tochalco.com/uploads/files/wososuv.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/11477479270.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/39987333272.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/katuvuteza.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/vabebejaziw.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/meresosomasegivovusoru.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/43601431108.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/32757446422.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/26826731828.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210910014236.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/kabup.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33886240062.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/8662766235.pdfIn PDF document text
    • http://rapet.hu/files/2436850381.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_off0000d983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 17844 bytes
SHA-256: a1b278752866e5e09a671a7bbadb49ad46ba3e0f4fe749b03bede0b6c1fe027c
font_01_sfnt_off000107aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 10568 bytes
SHA-256: 7c507b7c6984c8940d95b2dbda3e58ef61291077082f39c5da28fdb41ff145b7

Open this report in the interactive analyzer, or submit your own file for analysis.