Malicious PDF — malware analysis report

Static analysis result for SHA-256 68063cbe64d17bee…

MALICIOUS

PDF

83.3 KB Created: 2021-09-17 01:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 542ffb72418d2f4f39b3c94816ef9af6 SHA-1: d77733431c1550c6b60e3d5cfd37ffd450a50988 SHA-256: 68063cbe64d17bee328d61d09a6c90a321863e63b76515972a2ac5b0c832247e
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external PDF files, one of which contains a URL that appears to be a download lure. The presence of a deceptive download button further supports the phishing and payload delivery attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://smidgel.ru/uplcv?utm_term=new+movies+2021+torrent+magnet PDF link annotation
    • http://sitoad.com/bbqjoekey/files/202109161521119732.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/68698441571.pdfIn PDF document text
    • https://ksboutlet.com/file/files/96806527477.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/pigogaguji.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/zuvavisegutut.pdfIn PDF document text
    • https://bawauang.com/contents/files/winemoxiridopagim.pdfIn PDF document text
    • http://domuran.pl/files/file/wojad.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/gojogiwokata.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/68017254344.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/64956364294.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/kifanuzobute.pdfIn PDF document text
    • http://northcity.rs/slike/files/sowabagekabob.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/36289021151.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/71820654906.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/luvivitadasaxirojif.pdfIn PDF document text
    • http://hodori247.com/uploads/files/69737626759.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/77348041898.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/46506257065.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54400739094.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/86029220917.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/66608777301.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/juwofeloletexuxinexomulo.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_off0000e306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB18 16700 bytes
SHA-256: 0ddd628d6ee4595e19c9a074edef973d8dae816e179f3040f09984fd5fdadd34
font_02_sfnt_off00012690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12690 10828 bytes
SHA-256: 9e7bcb8c67bf72c00208ca74a97be33dbdeb8a8c81588452ffd853991dff8dd6

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