Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a42bf96a88a602…

MALICIOUS

PDF

114.2 KB Created: 2021-09-01 07:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb89059c5a50a1d46b4c280881c23a31 SHA-1: 74d1c3accfaba28a0a9f731879cf77afa89d7ad3 SHA-256: 93a42bf96a88a6028fb82dc7df3d6937d47cc3a324071ab2f92341f811baa02f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to numerous URLs hosted on compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and a link farm heuristic strongly supports the classification as a malicious phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://garglob.ru/uplcv?utm_term=traverse+meaning+in+tamil PDF link annotation
    • https://abcoegypt.com/userfiles/files/18273634817.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/zozir.pdfIn PDF document text
    • http://headrepublic.pl/images/files/sokelupofefije.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/tovopeponugituk.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/g4q5d4n0sm3tu662k5737rre06/29008548060.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/59956039277.pdfIn PDF document text
    • http://dearbornshs70reunion.com/clients/c/c6/c6cacd1d9512a3effe7244eb89d69e0e/File/rarumavoregiber.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088acdc5fc5b---93267781462.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/klc272njkg8epnras32m0n63tp/4737616089.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/90124343337.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca9c81d941---malutesezifukuxanebenukof.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607248fbc2d89---67998487871.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c59eea73a31---lokixawoligavurujajoka.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/vewodotomabirubi.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/7600988678.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2539b95af23f00395ef991c3aff7fef8/35542977501.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/68f2f4250fd6708780507d781e485510/77102108516.pdfIn PDF document text
    • https://robertbah.si/files/file/rovefole.pdfIn PDF document text
    • https://linardi.ru/files/file/rijenemememeniva.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161042409b324d---89707799542.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/edc072f7ad7905ff916ce62ff5a25a07/wejujarosetesugekinomuxex.pdfIn PDF document text
    • http://bociany.sk/media/file/nijekomokiwamiduk.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/70108244464.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/07tvelvge90hnlknsmekpr0olb/21739718742.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/gukejuvileg.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_off000153b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BCF 10360 bytes
SHA-256: 71993632fab5f26d04f8a87b73d3c87bf52c64694d02921da01b700bebd91afd
font_02_sfnt_off0001832f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1832F 21176 bytes
SHA-256: 51276ed76b79edcdf68ca1c3ce410532c20c96650d256dd11571c0675239b3cd

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