Malicious PDF — malware analysis report

Static analysis result for SHA-256 127892c2119bc418…

MALICIOUS

PDF

80.8 KB Created: 2021-09-17 15:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 82d07ffb91f0296f3be0dd7098de2d87 SHA-1: d6785bfc4653372b1b96786b37bfc73814e2bc88 SHA-256: 127892c2119bc418f0bd96d4755f3f68c4c5779f5c4e56e475bdc5569c5627c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs and is identified as a link farm, indicating a phishing or redirection attempt. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document's purpose is to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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.
  • 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://infrive.ru/uplcv?utm_term=download+a+game+from+play+store PDF link annotation
    • http://getrade.net/uploadfiles/file/zegij.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/14434851181.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/ralamulemasej.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/vuleximisapowomofotak.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/oanddtqsceog8hqou57u1gur1j/pifum.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/61455545337.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/163062402771067832024.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/duxabavilakipubu.pdfIn PDF document text
    • http://offerparts.com/upload/files/49955477119.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/wipavexeruk.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/91407395195.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/pinuxem.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/65782327303.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109131932334434.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/vebewojijorimitiguxabow.pdfIn PDF document text
    • https://moolans.com/uploads/files/jozajuwumutarosajaxusab.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/98142271388.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/8899296881.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/vofidotafiwizadakiwepasud.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/gurivawerobuluwez.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109022220042097.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614178612d47b---nekubanuvari.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/gavexakaxuf.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210903225103.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/98618300053.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_off0000d582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD582 17956 bytes
SHA-256: 5822e9177a11f1a3532baf0cb4cd3bc9483f5ab5dba0923e6f8a2a52571c3431
font_01_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 10952 bytes
SHA-256: 78002fc38cb7264169b51074360abafc75478f509bf284418c5c192347a6b68f

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