Malicious PDF — malware analysis report

Static analysis result for SHA-256 082f72524caf2c11…

MALICIOUS

PDF

71.9 KB Created: 2021-10-02 19:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01f8c8ab13d62874359fec7f51075e0f SHA-1: d4f1335e3aa02bdb39ba231b2baab8e084db64aa SHA-256: 082f72524caf2c116e6e2e30eaf315f23f366336777d6bd70e0cf2a33534daa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=be+kind+to+yourself+meaning PDF link annotation
    • http://floridare.ru/app/webroot/img/uploads/file/521105_kivefutedi.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16144be7345329---nafimuzulojowoxogewofasul.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/70838675104.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/wipadi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eab6aee824c42f1de01e2d80017b8e13/9860114043.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/vifawapozajoxok.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/45593831324.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16330711511868539955.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2532ecb10---vegakatomojana.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/16340357954.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16148d86a2d488---mobokudatejejapiv.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/wuxana.pdfIn PDF document text
    • http://pasted-radio.de/web/files/nunebinokakenuj.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/17201638483.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/govabinav.pdfIn PDF document text
    • http://ccadl.com/files/20210912050050.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fea8c922b3---gezebo.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/79476016591.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/36807761374.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/kegowoj.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/digowulax.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/wezom.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/dimukutikezetuwabejabe.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/53478959695.pdfIn PDF document text
    • http://appextskihjthj.handylover.com/upload/files/83774544189.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_off0000b576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD88 16576 bytes
SHA-256: a562255d138ffc09cdae0925350503a28c7a2bb08bda5576a21a068ba9fb6e7a
font_02_sfnt_off0000f832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 11056 bytes
SHA-256: a88c2806dfefead6db278f394ab068204658b525fa1c6d50ba8b65b5018c5e9b

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