Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abba2c69dee84cb…

MALICIOUS

PDF

73.7 KB Created: 2021-07-02 08:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 98ec95c9b73928dcb9deec60202f04d8 SHA-1: 1a297be1a7d10f928825f77fe99d86f3f9969924 SHA-256: 3abba2c69dee84cb6cee34b071214799a81a493106d622e8d569cf091f622418
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to multiple compromised WordPress sites. These sites, in turn, host other PDF files, suggesting a multi-stage redirection or download process. The primary goal appears to be directing users to malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/pcrjlt8t3k2c3kag3hmm3n18hd/57610965655.pdf In PDF document text
    • https://alperbehang.nl/userfiles/file/57147164913.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a44e71738d1316fde6296f4415a3f341/kevar.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/famibazudape.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c674235fcf1---sidutufujixefunizove.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/c8d325e148ba94d8071261c86ad8ea87/90213071046.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/e5111aae72c42d5c2ce7ef2134de9b09/42331290568.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/nezexiworidedagifok.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d9c19d100---ranowezamem.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/tnshh01vkl5d8fap6f36nbo0g2/gegomusafumirukiwutusem.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/432dd3881ca803796ae8301311c6584e/velosibipekurovutukib.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d097cb409---bajufu.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/a53bb18049d1ed93862d6f282738b7fd/42710027376.pdfIn PDF document text
    • https://steammining.com/userfiles/file/86476079285.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/goliruraponunowugexufat.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/nsk83huspvekmct9vqmt1su60v/48898116811.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/c01851646e36b59d127b4620a6e43f45/79866804633.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/bomugavonox.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/jekogodidelepexovi.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/ximenirisamujosavivemifa.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/jatug.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7fa29807---zujajevoxonisenavaruwokuw.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/be1f4457c8858331a229bd3a0049054f/narudisefulejugu.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/nasawatemunajiwo.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/gubok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=computer+and+its+parts+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1C 16268 bytes
SHA-256: bc0b8d65dffff0003912a807433b7b4ff230dbba0f3e044b75be9a00bddd1ae0
font_01_sfnt_off0000e8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 10744 bytes
SHA-256: 39a206924670c2f15ae0b4569320f04cc09ff3e619237acfb886f84a5fdc40a3
font_02_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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