Malicious PDF — malware analysis report

Static analysis result for SHA-256 563331ff2bc31a93…

MALICIOUS

PDF

74.9 KB Created: 2021-09-01 18:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 006ca01f61d4fd967c8d605e1acf584a SHA-1: e6791a49863b34635eac4880d99434a7e9f0955d SHA-256: 563331ff2bc31a939d4bd2dababf35f14a0580a001c9b192ba451c0a026c1356
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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=tidal+wave+transformers PDF link annotation
    • http://bycongroup.com/UserFiles/file/62278914364.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/66410468905.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bb328e2c560a88a07b181a03aa7f93f7/93900258081.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16119f80767656---85790460664.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/fukefokekupesugugavoneni.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/39209288779.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210901_DCF317F5AC178C72.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de4051d16e---12248347730.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f57c0cb151---76276541859.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/vunitafazibodotodavebiv.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/10e29c9913802bc5c175ff3a65348d07/46327681286.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/80576883209.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/faruxikixixe.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/26574173612.pdfIn PDF document text
    • https://aspirans.com/files/file/linabodewinizinax.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/44odo1ac7st1g81d378qf6fugb/javujiletogudipo.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/mapuzibalikoforo.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/49432948964.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/tie8tug8vbe350imgktugsr2m4/84246196218.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/43048571788.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/37063209245.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/bujagamit.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/55702373047.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_off0000c09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09B 17012 bytes
SHA-256: ccc1a17bc2fe3a09e760e7c1e4b530ace57cd244621b890644dff3dbd2c1975c
font_01_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 10628 bytes
SHA-256: 9bff48480344cac4914cbb06723544c78eea18a4e27e92e33a554ed38bdb99db
font_02_sfnt_off000104da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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