Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe6f5df73651849…

MALICIOUS

PDF

83.4 KB Created: 2021-07-04 14:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e10d626822b84cd224ae7a821226db0c SHA-1: 7b168a822629f467f4ce073f68d8d4628a4abf88 SHA-256: cbe6f5df736518491bf32ceff7a52b283dda669442086b56c65d202a052c8911
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains hosting PDF files. These links likely serve to distribute further malicious content or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://enricobarraco.com/files/kediziwoduka.pdf In PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd7fdec4f8---xokewepe.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/7674535378.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/23af9cb2036db8a5e493892966e65aa8/1748946878.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/jeledixofobozed.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/pibovurivese.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/bagade.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/52397461508.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c73435acce---mabinafak.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f9ddcc348b19602fa79bff18d5135925/fojalegasup.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/cecf66335fa7880ff487bfe5f77b0320/9603953529.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d5994a7b2---miradode.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210626_190416.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160946cfc53364---62178782568.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/0ldgl41400dam9irqblag1gm29/79057034248.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160782014b386e---kojakinito.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160badac2b38ef---62873416021.pdfIn PDF document text
    • https://penal-garazh.ru/files/90388547783.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/79001260246.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/woluponixarevetojiwipeko.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/n7k67g3snte303p58apj6ods9p/sifakavelexuxepurulux.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/78496463149.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b16221221e---zuriludibopiwat.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ade0cb10d61e7ed105e9b9a182f19750/ralexubovelemon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=world+country+capital+quizPDF 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_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 16852 bytes
SHA-256: eef509fa778294bc8c8d93a18136ea42e7db25a5f4dac7efa6879cf03d044981
font_01_sfnt_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 10620 bytes
SHA-256: c644e07f830f8e8c651c26690cfb572ccc6efe410238ccb40e90ef77dd0fffcc
font_02_sfnt_off0001281b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1