Malicious PDF — malware analysis report

Static analysis result for SHA-256 98daf2364730256c…

MALICIOUS

PDF

76.7 KB Created: 2021-09-08 10:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a6be2b2f5833c388a960c16ad1147320 SHA-1: 7c5fa4e8bb8bc89924af160d48ec00f0f720258c SHA-256: 98daf2364730256c757f374ca8c6efb563d5f9960f28b5a0b6e536ab8bea6029
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 embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to malicious content through a series of redirects and potentially compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://moscowprice.com/content/xuploadimages/file/49587323354.pdf In PDF document text
    • http://teplorium.su/userfiles/file/50748030916.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d405b655a47eb245e918308442a7f3df/rupatukovumugubeju.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/jikulujoziluw.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/62942087628.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/zugenoku.pdfIn PDF document text
    • https://fond.ru/userfiles/file/27447601989.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/vonubipevasozago.pdfIn PDF document text
    • http://herve-coiffure.ci/files/29980877745.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/1628638899124.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/42205205287.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/p9bbtpohhbp221vvjvq1q7rma3/45717260770.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/fudamokekelewodefarinujol.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/342368f72ecae63b1816067f59f417f9/magosakedawaro.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/magosalamuzamaxasinumu.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/19664288402.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/kanidur.pdfIn PDF document text
    • https://ksuskalology.com/images/file/9075600499.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/32653225387.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/1f709df43d981842c8982bf612a0d824/rumal.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/daxojudomekonas.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03a39a6682---kolikaganutuwaf.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/xupumakexejuguperizox.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/67784390147.pdfIn PDF document text
    • http://weldingplaza.com/files/file/67856207048.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138424cb4a29---92789088692.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/62074709469.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b20947a68---50518341849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=double+exponential+smoothing+forecasting+pdfPDF 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_off0000c8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AC 11412 bytes
SHA-256: 3cc4226040a3d7077df24d2b2da26da95136612402dc35842d38e24e4401441d
font_01_sfnt_off0000e302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 16372 bytes
SHA-256: faeb2448b9511fb7d16de0a54a39daacca72bde80f7e93635bf6452fac77112a

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