Malicious PDF — malware analysis report

Static analysis result for SHA-256 079a2fd996489407…

MALICIOUS

PDF

95.1 KB Created: 2021-06-26 01:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8169b602860ac5120c314dda29301f64 SHA-1: 3a37fa76667259b934dc52bd07d19c87567b94ab SHA-256: 079a2fd996489407fa578b88d57b548590248264103812e0d700cc42ef681850
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and other disposable hosting sites. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/b4la9c8q97i336qf1cdbndsec2/71568237160.pdf In PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16241531146259.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcfd36ba72---rojikalefimaseke.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/46e656fd432b42ec1ba4562fb437055b/37963784252.pdfIn PDF document text
    • http://attlas.center/userfiles/file/77523333202.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f84b3781b529045413908159c67f6971/57395298572.pdfIn PDF document text
    • http://gabortech.comadmin/file/webosiw.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e431ed9bd488d49afe6104b0518573fc/25520210335.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/2835798.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/63f62b983a34c2cfe1e8b5777844583f/zobutosizejamupukanuvotul.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3eb3d9c85---dunovo.pdfIn PDF document text
    • http://poiskvod.ru/images/file/83968609953.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8e9c7ebc3---makewepimuxugexiwemowonok.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jbcfv7q9lcd7k8s387juphtkq2/fabonimuxigamevinuwox.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6d9ce46e---96674231619.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/81230e0e48cd734b861fc62edfab1d6d/7507184818.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/jukozosowoxizari.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/05e49127616087fe037f327184a0fd9d/jakabemojisemumowatukab.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080e5c2b6433---gitebaniv.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/bf5a55adab95f7fdba34cc6e82a0bf9d/85373050180.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/hp8gr0kgle2b5dv9jjh1gpboer/62595824608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=machine+learning+entropyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 17636 bytes
SHA-256: d3481548d114a11f7e3df19a58cd2302cac354e0c7a3f8c3592a284ce9e64051
font_01_sfnt_off00013dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAE 10592 bytes
SHA-256: 5cfd64d1de6439bf903face6dd51dd7398dcf5aa05bfb0f091927fbc1cecea38
font_02_sfnt_off000155d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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