Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d16167881b07168…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 00:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eff6e4d322beada3a90974a28c59dc98 SHA-1: 5532ffd8a81ad0bc67e6da229837a6e746cfd659 SHA-256: 0d16167881b071682fa6ac49dc59a1824b00c831da1787267d56a8f5d80d6989
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/331fa207ac002159c797f2933b425987/28740252118.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/glfkqrb8tgijpjrif5daibedq6/fudimod.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c647cb1739b---fovajepakubi.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ku1ba2pjg6bb4nvhikgmj7ti7/61858800108.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/jinurevoludomirulom.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ed5362458---kajomelazorakuwesilalosud.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/dadupugabevitumixozese.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/28750885075.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/17396149080.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/ca39a287cb84aa6758aa3b8191a0ff5f/39600111247.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/81198325295.pdfIn PDF document text
    • http://belv.ru/userfiles/file/kopezerinepexumasep.pdfIn PDF document text
    • http://minerva-collection.net/files/files/bupazimezibe.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9380f117f7cc9243321d0929dae84b28/71836792462.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91931356891.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/53208381896.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102d5af9e5e8---loketubima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=returning+home+quotesPDF 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_off0000e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E4 18256 bytes
SHA-256: b174cf9a60cf85cd7041184f981aa23fd60728d9c125c5ae8b8e2dab5c2e0a1f
font_01_sfnt_off000111a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C0 10636 bytes
SHA-256: 970e0127b0c477b06f92a471a883671016508fac6dd6b43d1aa87ddcdec3bd8f