Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d115eebe972defc…

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 17:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 80d51897c88f5a6ad14e9f7516124fc8 SHA-1: e58218a297b06777c81f8185d08a61484e9618c5 SHA-256: 0d115eebe972defc9750467cdad7bb969a7c6a7ba0a0932f1cfb344e2368ee9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://teedinmaesai.com/user_img/file/50045324043.pdf In PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01e14856c---lewisugenutidetoregin.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/dirujezunogafujo.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/80776334523.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/68843868862.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210909193424.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6b0fbee45---miwotipovo.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/70650542139.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/sebaxosizepawuwasow.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/55697151655.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/kixovanebi.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/remutulimivumapiwivop.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/99779461008.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/99f6164695fb1c72ee9d463c70095fb4/waloju.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/11917866099.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/60850540942.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/pokuzirureke.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/53182126427.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9ea58e7315552d09e9878fc22a0d39be/80055518936.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/84642907989.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/videsatev.pdfIn PDF document text
    • https://endobible.com/userfiles/file/xibevowenivemipasuso.pdfIn PDF document text
    • http://mqskin.com/luutru/files/bulifowot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+enable+auto+start+apps+in+androidPDF 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_off0000da2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2E 17336 bytes
SHA-256: f3f56951d5701c14c9e76a460d25a8f8cbc87398a81d8b6c4e50582f2de8568d
font_01_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 10700 bytes
SHA-256: f1a097b4f050c3f7c5b54bdfbcf64a5f8b3790f88a9e59dc52d2e80a787db69e
font_02_sfnt_off00011fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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