Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7f9e0c51f98df2…

MALICIOUS

PDF

73.3 KB Created: 2021-09-18 18:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0535d465b1fb0ae74ca6dba366131dc5 SHA-1: 56dcb4eb9576c0b8f6383d3fcd4e0c18f4c3bfe3 SHA-256: 7f7f9e0c51f98df2dfb5b362dd3d6677f64b26f74e2f2ba0ffdd2f98c918b542
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score. The document contains numerous embedded URLs, many of which point to disposable hosting or are part of link farms, indicating a phishing or malware distribution attempt. The presence of 'utm_term' parameters in some URLs suggests tracking or campaign-related activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://archism.ru/uplcv?utm_term=rc+20+game PDF link annotation
    • http://thuephotocopytaihanoi.com/upload/files/tavazuzijovozode.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/pubanowa.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/fezudatutis.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/88963981074.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/13439424565.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161357d45998d2---84482017373.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/434b7350aa6a3ba14ddcc3e1332acb54/42408868670.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/kabagusokutoresenutuvig.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/43977719796.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/sajuxubaxovakumiripe.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/15723388581.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/noxedeziwoguju.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/fezulagodi.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/fugogawotutosawedixok.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/jidafifa.pdfIn PDF document text
    • https://linker.tw/files/mudapepopumorujekira.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/11757178452.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/pinosik.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/91719577288.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/96022767825.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/jewanoworesik.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/mijepe.pdfIn PDF document text
    • http://canadianrockies.info/files/file/60477018700.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/fawit.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_off0000be6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6B 16632 bytes
SHA-256: 301c6a130904eceb00d536c014ea7e112c1f6262f2adf58584aca336bfa968c7
font_01_sfnt_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 10132 bytes
SHA-256: 34aaf0d66f60889700718e2c7826ede361ef796fd8816d42bf7f890e90b1efcb

Open this report in the interactive analyzer, or submit your own file for analysis.