Malicious PDF — malware analysis report

Static analysis result for SHA-256 f293ad72c7ff6c8a…

MALICIOUS

PDF

108.1 KB Created: 2021-07-14 05:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 76f9720d0a28e1043e9a061dfca939ed SHA-1: ad7df1df045e355ba2281209692834200a93aa66 SHA-256: f293ad72c7ff6c8a0ca033c4131fd33f6742fdc636a17c5167b5789abd68376c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm characteristics indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://architettoangeli.it/userfiles/files/winivoxasolilibexazudob.pdf In PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/50f7bcc73b161ff6b235963f5bd8a105/23231667417.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a91fca0a2---58793671539.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b33d89ac4---69596731373.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/zowikorojolaxeboxupowur.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df2bf66cbd---36201245226.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/ketipivax.pdfIn PDF document text
    • https://samowar.ch/upload/file/89892271443.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/8a5e8a0c87bcf7dcdac6adbf9965b6e3/kefijolaniwewanebiwap.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f351d18a2ce72a3cebfabbd0494c61b0/nipodo.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/1395554566.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8f6759129---56918034057.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/54158602274.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a451e668f---17614070663.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/vumadimug.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/tezudafukuz.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/91551076203.pdfIn PDF document text
    • http://headrepublic.pl/images/files/febenunovix.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/53741435504.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/4cb21a21cd501bcecdb72e41d5d07529/66704130068.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/julumorumasitevofido.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0498415aa5d9beeff482aea1f14e1181/fizatilufumotaxesufa.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/1h6ogmbeinn8mp5qs52cavv160/kewuwul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=a+night+at+the+opera+album+downloadPDF 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_off000145ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD1 10976 bytes
SHA-256: bf66c8ff6943adb4e5b23919621d1d5e24333de6838672db519b44d2938cf923
font_02_sfnt_off000176ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176AB 17060 bytes
SHA-256: 3f4cd943f61f8ea9372c114bade5437fe1d7f3ef972a2b5aaa7cfcc4859d2e21

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