Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80829ae6a7073af…

MALICIOUS

PDF

89.5 KB Created: 2021-08-14 19:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92ee548b3daca55fba0fe6d18d863597 SHA-1: dcdcbc7712a46a0f725cc8ab08aee85cdc93e18e SHA-256: e80829ae6a7073af37aaa14ee567a88971dacd9eec48dc6a8a680da62e945e11
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://inwebjor.ru/uplcv?utm_term=kinemaster+pro+mod+apk+no+watermark+2018+free+download PDF link annotation
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609829ab87751---84622997552.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/27991858230.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/vikopilebetiwofolire.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/4602254443.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b33a5b6c1a0---7059935088.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/17823584133.pdfIn PDF document text
    • https://isleo.com/i_photos/file/12291364581.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/e98423a1f2b154c47fee62568111e9c9/6940486587.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/atteofdvkfd2r0l7e5hqff5aa7/70324723570.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/80304360355.pdfIn PDF document text
    • https://egf.tw/test2/images/file/26204806616.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/84354193353.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v1dj0e7mledpb6fac5cmlceolm/fipawabelogikolov.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/oh4hcl9dlhs05kabhb143bp2t4/luvalapekitavojituwofu.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/66426561042.pdfIn PDF document text
    • http://sivam.pl/files/file/wunatupifijoduf.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/34089420002.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210723200758788.pdfIn PDF document text
    • https://noddy.nu/images/file/49014878409.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-1/20210701195213326319.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b569bc5645d---43773287339.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/490ccb1ce436f6fb06f110586acdbfba/gupigeza.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_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 11332 bytes
SHA-256: 5d9d6e9ab5fca706933ce7f0b137dc3b1bf53c0522a167c50a8e287b3502ed70
font_02_sfnt_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 16424 bytes
SHA-256: ec10d5a54c0aa074b4c0aa9266c30f70347ba994ff877130cb03996f46e59642