Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd2dc3762cf0f88…

MALICIOUS

PDF

79.9 KB Created: 2021-07-16 08:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2764eae500c1302440099a71bff04fd0 SHA-1: f3dcca3eece21ba09504806a624910582a5a763c SHA-256: 0dd2dc3762cf0f88ddadd3e5e6606725a02dd0bd1e385f036009a16ad54aad01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to host malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rvodf8vhlg9omfp2fscrq1os4k/sonemiwabe.pdf In PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/04f1aab6dc9f2e96c798ab97f54c882a/zaxixin.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/87757812131.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/83fa7e915b55aa91d4a235b1cad251ae/81411049395.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/mapodogasutalofelogunorim.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e45b6beb5---mowekolofomamisole.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f626eced7---goketeve.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160743ab538d97---33526396857.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/1714962463.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608482f9ad1a1---14643922462.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/jivuf.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/12292382206.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1fd3c014---25737979444.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/759e89db5193990e4e2e3e92b8349ae5/sisuwujafoziwofex.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/69356929ed49614cfb5d5f53a1847cd1/51710086027.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094993000c6a---84813013318.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f43b268c9c---jatojojotave.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/59646869842.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/liravezivadevirezodo.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/19818242568.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/ec263746bbba6f28070e9e4faebfbbb7/lebatojasirijekexelebup.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54a15e23c---jopabapolazusok.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5lmth11tf5jk3sogh6tic5nq8/returimibuduk.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/5fe10c2dac4efc24510992666041b6d1/zabilumop.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8aa2f4ce247fe58c844cb6dc38545ed8/2339433876.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/g151k3iv5ehrvps1tcq8d2qq5d/diduduni.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/64vfaj0qijml0g1b9rc0mdobp5/81297176218.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/74785924826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gateway+c1+student%27s+book+answersPDF 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_off0000c7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 10880 bytes
SHA-256: 452695b9f2e9d4d150371f1e780bc030ec0fb73f2361f05ffebb1c6c0d9b4837
font_01_sfnt_off0000e182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 22328 bytes
SHA-256: 106131b50dcd852fa872a4ac9c8604cb857eab829cf7f4ad099b145eda0b933f

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