Malicious PDF — malware analysis report

Static analysis result for SHA-256 56948c1dd6b204c5…

MALICIOUS

PDF

79.1 KB Created: 2021-09-07 16:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 463a7329b0e0947c2cf89ffe0a445205 SHA-1: fcd1556081a7b551c1484b24a18281989e4fb0d7 SHA-256: 56948c1dd6b204c5b62770442f5524c7ce0efefb57cd51d00d0203bc3deb4d0b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous URLs pointing to compromised WordPress sites and disposable hosting suggests a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam pretext, likely aiming to trick users into clicking on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=2017+gmc+yukon+xl+slt+owners+manual PDF link annotation
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a58eba68fad---kuxularoxubow.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/l3b5duiif06p6udamjfl0hesgj/13597205007.pdfIn PDF document text
    • https://digireg.cn/upload/nofefidunixigozomovukafu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/t6faninjbokurcnn0gbhtf0vo1/43439230940.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202108252107071419.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad2a897df---86053277808.pdfIn PDF document text
    • http://vhktn.at/images/content/files/26501222274.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/riod2vqba5e4q3g1svc7a9k4fh/firepoxifuk.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/92529874425.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210804055649.pdfIn PDF document text
    • http://17njl.com/userfiles/files/28663021634.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613530736315b---3267855531.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e81788478---81321208081.pdfIn PDF document text
    • http://cy2hand.com/userfiles/fizixo.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610a1d3ebf945---40047559966.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210817215957.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/plbn4iqtjnbglbr3gkrc72omku/66404433276.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/lidig.pdfIn PDF document text
    • http://esistore.be/userfiles/file/suradep.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/59553503129.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/jixerovaxexekovoda.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/63147661501.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_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 16044 bytes
SHA-256: 2a77613e3ebd03d8d76336f649806a1373e0e695c66abcae31bc49ac2e292b8e
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 11224 bytes
SHA-256: df4378fc5c988dcd8bde8dd14024dbdda3c639a2be2b8682a84b486249cea819
font_02_sfnt_off000116b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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