Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b47e942e757920…

MALICIOUS

PDF

71.7 KB Created: 2021-09-16 12:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d3edcc7d876d907550f3347e57e75c9 SHA-1: a5a53705de9b1dae30b0592fea74b900d943eb51 SHA-256: d0b47e942e75792086bee566502ac567d24b370f95288a70669a006dc7fe54b2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://inwebjor.ru/uplcv?utm_term=juegos+android+para+adultos+mayores PDF link annotation
    • http://iiiemjobs.com/FCK_Editor_Images/files/67923178520.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131f94cf2d5e---xopomasiban.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/bixixowofibijitebedasew.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/relapeve.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/42197440181.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/8192792708.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/51804283115.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/76871514573.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/12719301674.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/90798210904.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/fawanixukomemami.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/747e9d476320a0517ffb06267c17c9e9/90300256416.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/devexerutadowetabegu.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/wezidebawujabila.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/dupapive.pdfIn PDF document text
    • http://ud2-140.com/files/90520366989.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bihhe4begebhl77eh8gaqsj195/28858050710.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/filidepupa.pdfIn PDF document text
    • https://itscebu.com/upload/file/20210901084624.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e6487072aa053c741e60dc14e9e17feb/89182448102.pdfIn PDF document text
    • https://kueapem.com/contents/files/25164010985.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/goe65176eior69pqo907mou2si/zesesewitigixumof.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/82454149080.pdfIn PDF document text
    • 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_off0000b84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB84E 10940 bytes
SHA-256: 2ebd6640563382aa9a30111a3962be9ce50bfa1da940e6d91bdac17ded12cad3
font_01_sfnt_off0000d17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 15996 bytes
SHA-256: c5ea19139cf631596901f07b22f9090852097a6695e95bd4b194c1737b7c3e68