Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5212863fa04895…

MALICIOUS

PDF

66.9 KB Created: 2021-09-13 16:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6c8575d0fc092b8f3a27016b73073052 SHA-1: ccbb331ce75068d753a0b5172be12d35e0b3f971 SHA-256: eb5212863fa04895d89167b641832e4facfe26ed1eaba63e5063fb27150680de
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure with an image-only design and a clickable action trigger. The embedded URL `https://allytemp.ru/uplcv?utm_term=pkg+install+metasploit+termux` suggests a potential attempt to trick users into installing software, possibly related to Metasploit. The heuristic `SE_LOLBIN_RUN_COMMAND` also indicates the presence of command-line tokens like 'Curl' which could be used to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=pkg+install+metasploit+termux PDF link annotation
    • http://lungshingcentre.com/userfiles/61072598268.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/7622496003.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/66926833622.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/89569317435.pdfIn PDF document text
    • http://sireny.net/share/files/38307753454.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/zagafuzitevezanafev.pdfIn PDF document text
    • https://braus.uz/images/shared/file/11208173785.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/43621138752.pdfIn PDF document text
    • https://susta.vn/userfiles/file/18081460899.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/57341719300.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/guvod.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/xojakisireleseworupuru.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/botexexijijasotefodez.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/51681350219.pdfIn PDF document text
    • https://kar360.com/resimler/files/lopasuvigunonuwapukegal.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/53146971422.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/6238467711.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b7a493cfbd1935668adf48236d8a2503/48099700238.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/lufexunaxese.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/wepepuge.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d165319fe7---99324765082.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/15218586836.pdfIn PDF document text
    • https://kutt.it/msfIn macro / runtime command snippet
    • https://raw.githubusIn 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_off0000abb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB4 13720 bytes
SHA-256: 8ccb63d4204a0cb90f983275e474260d3b38013a26f1a63af3a5bc194d28e868
font_01_sfnt_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE546 10892 bytes
SHA-256: 204998c28e3a759fcfe9080ec05c66f4ddf05ad458a75eed5217a0b06dbbe266

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