Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48271fac2b4280b…

MALICIOUS

PDF

83.9 KB Created: 2021-09-10 20:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 60e47c38d00a8df70bcdccf20fde18de SHA-1: ed123ccd888275b45fcab352f19db31243e7a09f SHA-256: a48271fac2b4280bb1d86ac7ce44aaf3959811dbd10839e26d4bedfc2b69dca9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm with numerous URLs pointing to disposable domains, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns suggest a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=android+sync+with+macbook PDF link annotation
    • http://zsdbiopharm.com/upload/files/mebametobesufolo.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/tojelewedukugebajetik.pdfIn PDF document text
    • http://www.heksan.com.pl/file/rotawasoneragasipezem.pdfIn PDF document text
    • http://jucal.es/images/file/15468287464.pdfIn PDF document text
    • http://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/74957276068.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/98249160629.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/66524456231.pdfIn PDF document text
    • https://svltv.in/userfiles/files/77382334952.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/91523526561.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109100347398034.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/30981995926.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/wuwedilider.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/japakuvadovefet.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/zavefazokabigojadugefuboj.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/bimejazebitufugupil.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/natodenetidi.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/10838931079.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/18874373033.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/xeferu.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/fidoporo.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376845ab042---19605203576.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/82128737518.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/65274994711.pdfIn PDF document text
    • http://twilaw.com/files/files/gumarabalomodoxolorutat.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_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 10872 bytes
SHA-256: ebefadade5dc47356b2e0c3804eb2ccb42493f093a994e0984a1feda3d30c14b
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11465 17764 bytes
SHA-256: 760119ce855a4710d7cd4af83f2e9fe9a06695fa55be2b0da8533e4559110abc

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