Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc0cc5b7967d88f…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 20:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2c30b7d90754ccdba83eea86b21745de SHA-1: a9aa0a0d3cf7e9947c0eced4550b89bb859f4609 SHA-256: 8cc0cc5b7967d88f8090d11e10947ce79f1d7ae7f69d08546ae628e14697e844
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to websites that appear to be compromised or hosted on disposable domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The primary attack pattern involves luring users to these external sites, which could host phishing content or further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a364e04c339---migegoropabajofalunifiv.pdf In PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/14227492364.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/45370844899.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/44225040696.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081cfe6ceb26---35430631259.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/tonazafafixopomujor.pdfIn PDF document text
    • http://yilip.net/userData/board/file/purasini.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/nesinamunapokedaweli.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/65913168579.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/pefedideke.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6396b2b7ec---31002860686.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/lixano.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/7dd879557cdc7e13eac1a8cb70b39372/lavozu.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092259e251ad---napajujifoxilizibefawuf.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///66326819779.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ibt9l3ni7nsbp6puglaod82pba/simiwonuruxozodubadazege.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dee86bdd413---wupisalifozivekupova.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/5402008826.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/98961614040.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/tedejazudobixavexag.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/jrc12kuihc53rsca26sb227je1/wesaj.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ea915720895aad32f7b8fcf194440c7c/wojalelemuvelesuziba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=general+science+facts+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 10532 bytes
SHA-256: ad6846dbb9fc78017a6df4a8d5e9e341899edc72ed7dbf701c3d32b6a33f2508
font_01_sfnt_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 16808 bytes
SHA-256: 3c89ea5ff23bc3dc56f5099b9573025fde0a4c61ad01341842643f5c06e05933
font_02_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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