Malicious PDF — malware analysis report

Static analysis result for SHA-256 1743a0a9356424ea…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 13:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8650978943f461ddc2ecd411e20c18ed SHA-1: 6ad1504253c1b61f51a6a0b3efd6c4f1ef7706d3 SHA-256: 1743a0a9356424ea7f91acbaf8470b383f79f7cb5ed1068f533c7374566d7cc6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. This suggests the PDF's primary purpose is to redirect users to external sites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://halaljones.com/uploads/files/zigarivozupusif.pdf In PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210909_C6A7111F618A938F.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614001f6dde38---xurabafobutonil.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/4284534957.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/26192704066.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/96131628020.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/waxajowemepagem.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/39475392035.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/jojumorexe.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ae39135f6f2ab80aa67b905854519c5a/33194697873.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/3422976023.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/4447566761.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/najesipejuxadi.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/90342311645.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/80862886872.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210910040214.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/78459942743.pdfIn PDF document text
    • http://bluebossa.pl/files/file/72165202357.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/5753776641.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/kirenosugo.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/jimidodosen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=best+rom+redmi+4xPDF 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_off0000d956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD956 18312 bytes
SHA-256: fd83dfc10fe8e64c90ed8b5fdd0f600140aedc715dc596a635bd8da6486219fb
font_01_sfnt_off00010954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 10328 bytes
SHA-256: 6a3cd56d90c87cb4f4c514bdd903ce544102e091cd138875041d2cb9b621abf4
font_02_sfnt_off000120c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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