Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2ad2fe4ab1556f…

MALICIOUS

PDF

94.0 KB Created: 2021-07-23 16:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7602a44df35e1c4c3c6e7d9cc9ca8038 SHA-1: 850b47b3b597a53d83cc511a845f34388f3d8bbc SHA-256: ab2ad2fe4ab1556f11052bfa919a4649a5d161806e437795bc22f22ebec773f2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, with several hosted on compromised WordPress upload directories. The presence of multiple external links suggests an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://belloverde.net/emailer/file/bupuxatisuj.pdf In PDF document text
    • https://starbox.fr/img/files/39437464993.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/90613296134.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed29ebea84a18fee0eb07f3b638f7a31/lokesobegefetuxetufesapa.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/95pdqhdu6tuqdccddl0fictijr/kegogux.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/xaxezelabo.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/90740165864.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609552f9310dd---pojapisiwogu.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/94692494742.pdfIn PDF document text
    • http://m2m2design.com/userfiles/88252549548.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b74ceddefc0---26457413492.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb787a90f---43852754974.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/42081610957.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3cb7684367ab40a2c5946ecbb587be16/67007543813.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb53ff2064---76104906150.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210517/file/16212143725738.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e62f0713ecdf56d117d40b73a7875322/figarodatesajokivovivaxes.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/793cbebb07f4f50cff4cc04b4335e974/jonasebisemekuj.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeddbc2b31---688441424.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/93778444803.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ce7289cd---fawetogu.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607303fa82e80---sisogekukaredarozezix.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/11359801068.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/saxogenizofo.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/66662446615.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/9849954f6e60bb7e493df16179881204/87782046796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+does+it+mean+to+be+a+professional+soldier+500+word+essayPDF 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_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDF 17476 bytes
SHA-256: ed8d7e6e08269aaaa6b18df90ce67a23b1b9a05a7fd98e12ccee83b2f011095e
font_02_sfnt_off00014d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D85 11352 bytes
SHA-256: d10bfec622a5cfd8c8f2f1081d5fb1172d2790cfe69172f5a681d16b7a6d30ef