Malicious PDF — malware analysis report

Static analysis result for SHA-256 20171ad65e28972d…

MALICIOUS

PDF

92.8 KB Created: 2021-07-30 22:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d6a3fee11cf9d4779d6a28ee182c5241 SHA-1: dfe12cda3da85022217182556708396c985bb35e SHA-256: 20171ad65e28972d62366e0eb20247f75bba2815238ba482f1340281ad4a97ae
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and link farm heuristics strongly supports a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://anadarkogomezfamily.com/clients/7/76/76920377ef4e0cfe2c6e77079a05cbd4/File/podawogutodoz.pdf In PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/d72a915a481e904108c2bc32bfd4d086/92377099839.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994900108ca---52772356145.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160758efef2971---meviz.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/63666047375.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/26203808129.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/c6ppteek4ajsdb690qekjl9q44/30755646759.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/fupabemega.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161031f94a8b41---46809412542.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/47355346634.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/71501715627.pdfIn PDF document text
    • http://idcla.net/upload/files/bibekojidejuwumedab.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/13614010656.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/7878ea28c98083e4877c1e29842d62a0/18481129091.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a7b12c203---fuzodenozatusejabev.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/lolagugozeriminipepefaw.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/27030038869.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160730901f3b5b---nixelerejafikisawamov.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/gufagokatubogajosixus.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b9b5a8adf---goxawefasoluxetid.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/12398225703.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/vobalifeketekexov.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d02867cc7bb7faf15b3fceae48e5b2d/7896609078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+4+review+ignPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 18112 bytes
SHA-256: 4af9bd9145764afe3445a29356764a159f4343538569e5679d1b3be5e17135cc
font_01_sfnt_off00012587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9E 11276 bytes
SHA-256: 6caabf4ac4f6ceb3feafe14046c1187f38ee48cb69c3581b20b4307707dc4133
font_03_sfnt_off000157bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157BB 2868 bytes
SHA-256: 696c04cc595aff94ea7b0ad9b944d3b04474b17bb36a0007d5355e5b08a36481

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