Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d1465918f4e131…

MALICIOUS

PDF

67.9 KB Created: 2021-09-05 20:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0709bf17a156258b1b75c8c23025d8ad SHA-1: d855f9fb807e99a41acbecf3f30707cad4a1862e SHA-256: 96d1465918f4e1314d0cbe3d5ae4439647318032fa632796ff3c46a691dbf5df
176 Risk Score

Malware Insights

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

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to hide clickable links. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://antonio-pelella.eu/userfiles/files/95384145737.pdf In PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607de85146bb1---14971029857.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/sepuso.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/69070757516.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0f6c353c98c9615e5905ef6090ff574a/27086574898.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/7706d91b5ca0590876973eb3ad1ac2fe/33003330727.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/gozoxufafedamixavajiv.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/96647939333.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/42568089280.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e3399aecf---99275733050.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/61703346020.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/vuxomej.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/rakoxudesaxomalilufe.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/vegaxebozuwokowabuki.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/88d286743c5e9bcfeea688385ec55d33/fototuxokomemumininetu.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/lgo0cq7ec360jc0q92ra9n1oi5/84573971609.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/jaxikadejunelowose.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/98835972466.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/pc97d9kbulcs3dim4l01pckr4m/kufigelojefeterolegege.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea9ad61811---kanedazexekowotili.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/givigenet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mountain+dog+diet+pdfPDF 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_off0000b09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09A 10452 bytes
SHA-256: 984174176cfaedc50326156aa9a5cf1e69c6b4e59db33658979f61bc662b0a71
font_01_sfnt_off0000c833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC833 13836 bytes
SHA-256: feefaccde880edf9a51a8851107af35629c6d2eef20470c321ddf14b3cbb4b09
font_02_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1