Malicious PDF — malware analysis report

Static analysis result for SHA-256 adefc143721e4f97…

MALICIOUS

PDF

88.5 KB Created: 2021-09-06 13:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b82e7ffec72d9d4588cd58c712f180e SHA-1: 3f334e60b023f658ed54cef0376dfd2fd6f51674 SHA-256: adefc143721e4f97512253316f95a9d5b334416a9c4c4bae8120eddd1f8cd788
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to potentially compromised websites hosting further malicious content. The presence of multiple unknown URLs hosted on various domains suggests an attempt to distribute malware or phishing content through a deceptive download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64a91d3b41---bonipal.pdf In PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a27dfb2035---67375566818.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/20380888476.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160906505db395---vagubepubenixulevu.pdfIn PDF document text
    • http://iwort.de/userfiles/file/9774421313.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/72171881953.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/23511449597.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/65603512034.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/bavunadazasetaregis.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/goxixiw.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608750d8d0098---vugesuwo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/3m8avan9ilb1jtrr74o0jja98a/patemonelosumaxapopuxigav.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gapogora.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/gevenilekaku.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/pojemukeguvopewetenizaza.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/4k018tdtl7va0pbp5698u917m1/31785886530.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe64feef11---pidusogukadakukuxuz.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/mejurotudosunonejudo.pdfIn PDF document text
    • http://moristas.com/userfiles/files/5477062335.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/gijod.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/82245303369.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/5b921530fcd5c359feb52be360944cef/pokudiwagufofuletokaz.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/zazuzanovow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=tan+applied+calculus+10th+edition+solutions+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_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 18352 bytes
SHA-256: ed304087c50d6a27722e3aaa76338bf8d7956fea27d4729a20153fd9330a5c49
font_01_sfnt_off000122e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E5 10852 bytes
SHA-256: 3b1b59827daf9859d9bafc4b2e7a09458c90b9d4cc1ee25272a8e90605bc4e0e
font_02_sfnt_off00013bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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