Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cf077704962373…

MALICIOUS

PDF

91.7 KB Created: 2021-07-30 17:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a5be5dbd864e902415111da095cea04 SHA-1: debcff59477ad719af4496105c2d8ab5e040dbb6 SHA-256: c4cf0777049623738c7b158c99ddd167c184f1be863d0dd7bf41c8fc5fb1dd0d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised or disposable hosting. The presence of a 'utm_term' parameter in one of the URLs suggests a phishing or scam attempt, likely to lure users into clicking malicious links under the guise of offering free items or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cructi.ru/uplcv?utm_term=hack+dragon+city+99+999+gems+2021 PDF link annotation
    • https://debcopharma.com/userfiles/file/68001829533.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e71afc66e9c---sipenorilufovasi.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/80137231156.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/jozojex.pdfIn PDF document text
    • http://araonline.hu/uploads/file/vodapubejodegudekulagu.pdfIn PDF document text
    • http://liffeyartefacts.com/fckimagefile/file/juserofedudal.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/65577182842.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/31ad426dae05665047766b7ca33bb260/89470699008.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c297485a2fb---70935662372.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5a25cfaa4---luzaligivugejokibasavit.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/htu3ukpapap5tsltpob8969ft3/88387380674.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe2ec9e9d0---13397118793.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/wutimuw.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/povufarimezixegi.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981d073dc73---66994383792.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/dovujoxuzed.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/60863653743.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/e8fcrlfq0tkktbksoqoqgu84i3/jejalisefuvobokuwiwab.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/6ce38e1fc88e12089567ae556c1a6e66/natitikixovob.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9c8b512b0cff937a523590a7b8a504b/fodozewibulijuzogoj.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/surarapexivemixoroxuwo.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/41547352366.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_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001161d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161D 11324 bytes
SHA-256: 5d366da441a74586b80f45fd1c2e5fd504f970b0ce3ac2b7f0a0e3d06cec921a
font_02_sfnt_off000130ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AB 17360 bytes
SHA-256: d371633abb9415487e38bc46afb94ccfac26cec53e100b3138a6111b5fe85774

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