Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cadc67487a5829…

MALICIOUS

PDF

86.3 KB Created: 2021-09-06 06:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2afa4e7a7d35ec76c1af2b69967a87e4 SHA-1: 1dc92a30a884f9fb00721ed2979b5f5b94c40762 SHA-256: 80cadc67487a58291a122322714bba706cb9a5d30962aaec1665df10fd156216
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which are designed to exploit or deceive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mashura.co/userfiles/files/79942905697.pdf In PDF document text
    • http://agt.es/files/galeria2/files/93831977424.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/zuxoxipanare.pdfIn PDF document text
    • http://atrsara.ir/resource/files/rupalepozotasokonevov.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e829f9a915c825535a0972337f9b653e/97541981302.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/mowalowojagaravog.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a2ca1a091---vamujojebusewojomevasavum.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/916293180.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/p30jns2is15o2o5pf7q25krlq3/wanufatibumudidetojewik.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b0b70dcdf5074045e15d69b336882968/xobutizarijowisonemilidul.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ed82bc917faabc5e9f1559241b76233b/tebif.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/92c6b65030d6f10c9ab849cf11c28921/652817096.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36ce7ccc7f---97901290735.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/dupifivonevijigazora.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/mojipupirovomod.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/6qeg5e53650l75aa7rrtck741k/18593429330.pdfIn PDF document text
    • https://venus-forever.com/image/files/lumipamemojolis.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/niboderitir.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606e598498ef7---99662299832.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/dd29be896e7346c0e8b1577817bb25dd/jugozisudexijerop.pdfIn PDF document text
    • http://promador.pl/userfiles/file/86261316221.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/dd07ab062d85f72f94683ec93a4491b1/24685619574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=certbot+manual+nginxPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC882 16148 bytes
SHA-256: 1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78
font_01_sfnt_off0000de0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0A 24088 bytes
SHA-256: 2b8567ea368118268b6a1936be4194e54d84e22d7aa3c070664dfdc5a1c87f61
font_02_sfnt_off00011ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADE 10656 bytes
SHA-256: 3cd99b98348b6d868e58f03a8321e94a5f24021c8a87f8d932cef7b6b5689f0a
font_03_sfnt_off00013348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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