Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b7527793206364…

MALICIOUS

PDF

82.0 KB Created: 2021-07-06 21:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cd0d2e98c93c382c422254590f643781 SHA-1: 1d3a5e9d0722bd2fd411de7236c1911f0d3a7629 SHA-256: d2b75277932063646df9da360a7e7967b37702d1929508c6d97f7ad44b784d40
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 and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160db8bfead440---87726564337.pdf In PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89c493a02---88658770256.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160960d0215064---fuvanavi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/245ff83842adcd223d1f9bab15934394/25959528572.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/jusurifarapa.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/18909418196.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/63310581077.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/fosifizijoxodogugeve.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/zezagosomixurazabi.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/9a8c0da3a1acf6516ddafd381a67c9d7/wabanerifo.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/3958630718.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/b357c8a6473357cabda8a97e179748f7/parej.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdd1408af2---30908388599.pdfIn PDF document text
    • http://amajyuku.com/files/files/43816810255.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46fe62ca8a---11981120528.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/larenixusozupire.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/t0pfbb2eqfpudbtbaob502d0j9/14981623996.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/uvtm6eoeb2v2b537e30ck24hq5/21817923340.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/70cf6c0f5214d8c18d1faf72afa19321/23146854349.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/ruvugeluvinexefujewuraf.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/44484903164.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/19860768883.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/kefixaje.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/buxagoda.pdfIn PDF document text
    • https://123natura.com/stockages/files/25676831601.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1050deb25---89781683405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=to+be+deprived+ofPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 10084 bytes
SHA-256: 3151c3f79fbe1b226cc6f88f0caa0b6a2ab3068d1debdbc83a3177f6df4e8e95
font_01_sfnt_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 18476 bytes
SHA-256: 2b4f14b3a92937903f51d647cc5c58b582dd86f911ccd8a56e8d64e644428ca4
font_02_sfnt_off00012111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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