Malicious PDF — malware analysis report

Static analysis result for SHA-256 7813248a9c796729…

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 07:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fbb5dadbadbfbaed74e8319dfe7fae77 SHA-1: e5737b5258145ad5a583d038cbe1f799d771dc98 SHA-256: 7813248a9c79672978558eefeed6b811503320e3bac40470f862d8fec78c7119
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on various domains, some of which appear to be compromised WordPress sites. The presence of numerous links and the use of 'utm_term' parameters suggest an attempt to drive traffic for malicious purposes, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=anacharsis+cloots+pdf PDF link annotation
    • https://0a3exp.com/upfiles/editor/files/lezukoju.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/23051795155.pdfIn PDF document text
    • http://gojjang.com/uploads/files/fejakekodojepedi.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/760ovsv55vu3o128cg4vnsiev3/89532571467.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/fanafadulexefasununelalak.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/35294987077.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/86421935604.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/wawevesagogipalodafemor.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/nuvugirenekipugafox.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/dasitoximugevosugigak.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/113596f9879fec865787bb4c1651bf96/27862766119.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/1002950242.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/84c5f38007ccb23d122a87542cb844c2/6382512387.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/21500910088.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/uqci7bnq0qkhhc49fe9s1217as/83914525724.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8c33b14c5---vuvovuzatafamidixati.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781af7c5135---fatoxipumojigoparemeliz.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/fosumipiwutavupuxafidiru.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/sspk1k86mvqtlo72a3o5fig39q/64441097236.pdfIn PDF document text
    • http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/20032722945.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/bedejetegexoko.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160affedae060c---xarazisob.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC044 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 10568 bytes
SHA-256: e6c4766de8ea43b616e25cae5ebeb8ed755e2ed2b36770416123de0bd4400d06
font_02_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 18540 bytes
SHA-256: 0e0f6a0aa13feebd932cd9183656203ab06796110fee7a3699056148484ba1a7

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