Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddf8c2501f2a3f6…

MALICIOUS

PDF

70.7 KB Created: 2021-09-16 06:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b94530f3249cce29ddb8ae4b53ccb2aa SHA-1: 8a8eb7276cd1a833fb1cc2e3bd383dc3e4d67944 SHA-256: eddf8c2501f2a3f64ec40d123cac61f9a61075c023c2ad32ca1aaf0a7bb30bd5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm or SEO poisoning attack. The primary goal appears to be directing users to external malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/rupimox.pdf In PDF document text
    • http://chuaphucluong.com/uploads/image/files/nusezoxoviziradizi.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132c284b792c---gixomal.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/vijilekorig.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/juzilolodapowe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303bb685c5a---51173366290.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/20031404969.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/69470722096.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/fitovixatebidu.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/gafezunikufiwajol.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426bfdb47e8---91784392158.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/vimasetumaz.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090801272667.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/vaq9at5k03tvm8eskbbu34g2p5/37557124281.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614046cb60ef7---tedofefisujoxete.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/65119505810.pdfIn PDF document text
    • https://angkagenap.com/contents/files/17625941547.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac1920d706---87205093111.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/10806280478.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/74816894869.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/11484109124.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/36991963968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=clash+of+clans+unlimited+gems+hackPDF 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_off0000b32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32D 15732 bytes
SHA-256: ae4d577b31ebc7e2f0c8f3548a18ef393562662fc644f581a9d908bcedb10c66
font_01_sfnt_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 11044 bytes
SHA-256: 69a0ada5e4895006fe546ed0fbd0f934bcc244a70fa1701a0da33ad6cb37ff65

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