Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0d16f5aeb6b989…

MALICIOUS

PDF

80.0 KB Created: 2021-08-27 06:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f518dee0d7cd561f34540a8ff4abea92 SHA-1: 694ed1afbadd8825dc49e21d36aa3aa1ac24fc20 SHA-256: ef0d16f5aeb6b989aa4e225040ee627584f86de7e02c6d4c1dfe1538bd76b8ca
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or trojan delivery mechanism. It contains numerous links to compromised websites and a deceptive download button, suggesting an attempt to trick users into downloading a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest exploitation for client execution, potentially via a vulnerability or a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://allytemp.ru/uplcv?utm_term=marc+anthony+tour+cancelled PDF link annotation
    • http://opakowania-loga.pl/zdjecia/fotki/file/57696173248.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad367eaa82---80228827210.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6d9978f1a---59716946261.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/raxivigugunuzetawotilo.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f6e36d427dd2d61d599c835fcfe7fa99/44281386295.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304720b6dd---85452743967.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d8cbed32fbd0074f45dd64e470ff7547/41631657823.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/mebiwubaxifowujuson.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/60102948171.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa63008286---nitomawazidugawivekesu.pdfIn PDF document text
    • https://www.lloydsunder30s.com/ckfinder/userfiles/files/suwukiwa.pdfIn PDF document text
    • https://hojoairport.com/images/file/donibajipofofinusi.pdfIn PDF document text
    • https://shopabrang.com/images/files/kusijikuze.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/b6985da68488a527e24f691bc90ff565/lifikekin.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/26558040469.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d64219f527---zuzifovewezid.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b837137a6a2---xexeziwadusavaxo.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/1895760617.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5798b8447---jetoxofixenudexowuweti.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/10171237678.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/18174345268.pdfIn PDF document text
    • 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_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 17648 bytes
SHA-256: d975fb4b21c7264a782856328dd6ca31551e11b287ed794a2fcbf293092c7e77
font_01_sfnt_off00010248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10248 10412 bytes
SHA-256: c5fd01e8bdfe457ff5532c5434ea36bf82c4ce28d61e0d23a009a6d9b1d54ab0
font_02_sfnt_off000119e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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