Malicious PDF — malware analysis report

Static analysis result for SHA-256 d178b9f74ea7d175…

MALICIOUS

PDF

93.3 KB Created: 2021-07-19 12:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05c838b01f1998d4adaf08afde7d504a SHA-1: 2bddaa7c115622ecc8b003277fa5bfecc2c1c7e0 SHA-256: d178b9f74ea7d1752e4ab74887ca99d7b9f31007ff938d0710eb0bee12b519b7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body was unreadable, but the heuristics and URLs point to a pattern of hosting malicious content on compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.pattyn360.com/upload/forum/files/xidonefar.pdf In PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/3739ed399bc325ad196daa37a4c0c278/62027080894.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608107d899c29---jomun.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/fejikigafugekot.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9706d2a9f---829310208.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/188d6337280af8723150a3ddf9b12752/56895757320.pdfIn PDF document text
    • http://teplospectr.ru/images/files/xuzoxi.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/icg6hp55lt95qtgho1g6fj94fg/60157572444.pdfIn PDF document text
    • http://vhshf.de/File/95227554372.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/b2ktirnvki3u9itul8l41glafn/44445134467.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/bekebaziwavojoganeliwezu.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7n2ci6giggcisr9tqj9nvif1c0/pufexubuge.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kh951lr0ucjik82pkomnoitm4j/44260434140.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/50845604025.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160739f7bb1414---75389184550.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/mojezebelizazinefadirav.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769d5adbfc5---jabogogumuworigobovavuxa.pdfIn PDF document text
    • http://hzqzg.com/d/files/14970425690.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/vigowa.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb0f6d7772---58792306537.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/5d0d235afb098f7f93b72b90f77af882/fonatoz.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/39910001586.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/32743162319.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608c709ced40c---nosujon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=docx+resume+templatePDF 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_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 17840 bytes
SHA-256: ba2b001f405aee8ddda8e05d98a3727d6b4aeccbab8e86f0d15aedd777be87b1
font_01_sfnt_off00013673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13673 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8A 10540 bytes
SHA-256: d9f55b41330c6e530f955a39646579b42a6693d63014c458ec70cff5719549f9

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