Malicious PDF — malware analysis report

Static analysis result for SHA-256 744ee7ca4b2d6417…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 11:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9197dc162c47e4a03cf40f52194f054d SHA-1: d5da2e8b1e590b5151a29ee81216ff82ac9c4827 SHA-256: 744ee7ca4b2d641741b1a605d77beafd84573562bc88471eeb6c5ce401b99fe2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to distribute malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is intended to trick users into calling a fraudulent phone number. While no scripts were directly extracted, the presence of multiple external links and the ML classifier's high confidence score point towards a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://allytemp.ru/uplcv?utm_term=how+to+find+speed+from+kinetic+energy PDF link annotation
    • http://kamerton.nl/clientfiles/68198956465.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a0ad3c95c78920444c470dc8c4e4517d/sureraxovikugilekaxamawa.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/guzinufewigafuzameka.pdfIn PDF document text
    • https://noddy.nu/images/file/35232544727.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/48146825667.pdfIn PDF document text
    • https://pisausakti.com/contents/files/52935455305.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/72708526413.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/suzowelegeda.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/95207722528.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/wenig.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/kogozalelu.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/selojefub.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/pibanelagobowev.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142cdc8a82e1---68986602131.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/97714844096.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/77743369593.pdfIn PDF document text
    • http://www.ctmmaximoravenna.com/ckfinder/userfiles/files/giwanajijolisiwabuxiw.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136894dbd3b2---vodemusixov.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/sarizozowedusadanedo.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/27267905334.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/87539578320.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/74450194732.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/78151417394.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_off0000ced6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED6 17568 bytes
SHA-256: 35a7461d94a7da352292fc75d63ab5401cd9e46100de0d233c326a9c9a89ab2d
font_01_sfnt_off0000fcb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 11036 bytes
SHA-256: e0defa31671f1b8e29bb07a4e40faf671eb0a5ad8caf9bf22f1130083f47687a

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