Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea844bd1ff0621a…

MALICIOUS

PDF

79.0 KB Created: 2021-09-18 22:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 353dfea2c54d25d3d7574746990771ec SHA-1: 2cd8c8319ea80121aea787063dfb117af43bd08c SHA-256: aea844bd1ff0621a716a96288563b284c806b4004844230d62256d5ae2e66058
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URL `https://allytemp.ru/uplcv?utm_term=webmail+365+email+login` suggests a lure for webmail credentials. The document's structure and numerous external links to disposable domains further support its role as a phishing lure designed to redirect users to credential harvesting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://allytemp.ru/uplcv?utm_term=webmail+365+email+login PDF link annotation
    • http://silver1979.com/upload/file/vutaxivivelisazilafijuga.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/40164745823.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/28184451603.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/lukovutemovapujoxumivozeb.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/83218033672.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/sowanemekuxozexam.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/11018272868.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/texis.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/67634432284.pdfIn PDF document text
    • http://e-menu.hu/editor_up/xuposob.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/16086429335.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/dupogasavaz.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/43634854144.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/ralusibijuluwef.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/95577882557.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/97039029832.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/fanigezifenasog.pdfIn PDF document text
    • https://el-tall.pl/pics/file/35534078107.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/83988431135.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/24817532832.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614074ec41502---64016100786.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/xugemavuwamasu.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/44835157716.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_off0000d099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 10692 bytes
SHA-256: 80dca75d287ae7e3ee61c8ca185857b1a04cba5ff84461a431854ca3c1fcd54a
font_01_sfnt_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 17604 bytes
SHA-256: c0fbd4de1310219f8c6396397d893664fc6f359d1ecdcdbb951514ab5b24af6e
font_02_sfnt_off000116a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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