Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ead517a4d2e4f75…

MALICIOUS

PDF

88.6 KB Created: 2021-07-03 13:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1c18248a96523d72e613eeb59a3585a SHA-1: 685611c6e591463e07056317344045700630fe7e SHA-256: 7ead517a4d2e4f75acdc0ce8b01d7a608a45fa1814e77ecfb130e467abc59770
156 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, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The presence of multiple distinct hosts and a link farm pattern indicates a deliberate effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e94a4e7b6---xiroziwekonogufegobazo.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444ce03c8b---fopagofofofogekosi.pdf
    • http://flatadministration.com/uploades/fckeditorfile/67161150049.pdf
    • http://simonhoirup.dk/userfiles/file/sumixopiripiratu.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/1p8g82hcvkdi8l22ok5b66upbn/zironaj.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094e84b49ef2---83514902914.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607960e8447f2---ronusudakerew.pdf
    • http://51www.org/uploadfile/file/1c535fa98c24e724d0fbcf4e291ed08d.pdf
    • https://antae.be/app/webroot/uploads/file/68824402882.pdf
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/8ebc1c11ba3002be94ffabf947b7f619/fivatekadopagedozeke.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a100f44cec---guweduwazidojobova.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f193a594---kipipezipesigijew.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5cacb70d596ed419709e2d8e8e502b5e/dubaxagepolejesus.pdf
    • https://webmenuplus.com/images/file/javir.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/mngks2gdc0olktan3r6ihj91rk/55942594265.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/u90oi7aojsfb9nsb9u5q8tjhf6/12185252109.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e2796ec14c24077ce655ed925ac2fbeb/divelepupadikupakosixodu.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607748b660685---1624226288.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a3ba8b675---jukasowiniruve.pdf
    • http://aranykoronakft.hu/userfiles/file/96015464675.pdf
    • http://absolutelyneon.com/userfiles/file/rufabunewuk.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/bbb6cad13694aee393b823547770f538/50761818150.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/3095d4097fdaf75dff08e9d471734f28/wakapu.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/61795619453.pdf
    • http://anatolianlgs.com/userfiles/file/kedusudopojuketikuve.pdf
    • https://aashianarealty.com/file/52848788185.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cheek+cell+under+electron+microscope
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fb.bin
9106482cd98fccc76c0076afb70d5b6f00166ba4e07cdf36497472c2b82120f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 10840 bytes
font_01_sfnt_off00010fd1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 16792 bytes
font_02_sfnt_off000127e3.bin
0523db5c3087ccbe2ed13f845004fc3edfe54c8bba7923bd245c97c4aa631317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 17416 bytes

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