Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bb168b1bb2c37e…

MALICIOUS

PDF

87.8 KB Created: 2021-09-18 13:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 49ea628cc18d6d708f173ca4f487d43f SHA-1: 799cbeb80954d326afa2c91567615bacbe02af0b SHA-256: f5bb168b1bb2c37e187a2e7d0abf805059c864889611ca5977b66b6f3c737d91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of external URIs and link farm heuristics strongly suggests a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://coretry.ru/uplcv?utm_term=best+emulator+for+window+7 PDF link annotation
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364a8a45b15---magirozuwemafisiw.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c5acdf1da---fokosogazileru.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/20114537696.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/35bc1c2fe0f5d7b07f280b4435e6fa3f/19237350704.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/misimipiv.pdfIn PDF document text
    • http://hmondo.com/userData/board/file/xurij.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/kapotiwuzuzulazawo.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/fifiv.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/bejubuw.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/gofifexaxobaporo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137e26053fe7---menegelofixajuxusupadeda.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/91118895705.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/mivamaguvugosafibavul.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/riwogotisoke.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/vuledaxotigeluzigitij.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/35200669860.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210903_D13FBC300F482C73.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/zezumiteratabazovalox.pdfIn PDF document text
    • https://preciseenergygroup.com/media/44472966071.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613157d7a8ee7---jaxuzasijasimofomisux.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/98102385520.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-5/20210905071250617542.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_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 17536 bytes
SHA-256: 86ec74aa636812e5e50e0443219930e6e2011c2523f07153f29da7a41b1f223c
font_02_sfnt_off00013909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13909 10804 bytes
SHA-256: 9a7973ed97b8232921c064519c7248a2791ebbb93eeb7d9f86a660d8dfe0db46

Open this report in the interactive analyzer, or submit your own file for analysis.