Malicious PDF — malware analysis report

Static analysis result for SHA-256 2722c94917f7633a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 07:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d36ccfd3ed0ff904064349aa6f1b488c SHA-1: 5c8e88b233f1bb51d510175f21c8a1b50d076167 SHA-256: 2722c94917f7633ab610c52c37ecf10adb8cebf31d59fd195a33f4950d1672a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The presence of numerous links on disposable hosting, combined with a specific URL containing 'download+avengers+beta+for+android', strongly suggests a phishing attempt to trick users into downloading malware. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=download+avengers+beta+for+android PDF link annotation
    • http://av-jet.ru/userfiles/file/zebetazeputeruwejugiguz.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/24245266003.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/37251372774.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/58022358198.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/47018200949.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/30239804518.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/46885037822.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/gonojaludubij.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/jimagodijudubepewu.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-11/20b1b470e00e15b4c8401a9b44164c2d.pdfIn PDF document text
    • http://dezis.ru/uploads/files/panan.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/79373723958.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/xigibupumizakosodi.pdfIn PDF document text
    • http://gaudi.tw/upload/file/tebopawe.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/senivo.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80157569406.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090910260033.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e41f431162---kofudikopobos.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/265266231.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/63168654998.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613258cdc9d54---kikutopinuberarute.pdfIn PDF document text
    • http://mosjob.ru/images/file/waxadobidev.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/kebomajufenufajajufipux.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/detesabelilon.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_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 17704 bytes
SHA-256: 996f3ca2fd188e36d1e3e32408a38270f8e101d6004ae5bd0453c626b432df36
font_01_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 10824 bytes
SHA-256: 000f94e66ccd336085f66bbed3ed3d96c9c08d809db050a7c15b3463a5e9507a

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