Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ead079683014ea4…

MALICIOUS

PDF

78.7 KB Created: 2021-09-23 22:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 701fcfd839fc8f3256e1897b4f635e5f SHA-1: 610b8814f84e79810f04e8b4de15e58944714d7b SHA-256: 5ead079683014ea4b64827a57b3aa09b1c26bcb2201c7c7b6528a7b781044496
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests attempts to execute commands, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=iphone+6+in+bd PDF link annotation
    • https://krantiservice.com/ckfinder/userfiles/files/jaderabo.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/19563591426.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/nemotepava.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/95257443540.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/nakiwojafilatowirumexifar.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/nukozazuwukivopiseki.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/xuvegiwalevizavosorabota.pdfIn PDF document text
    • https://fasleh.net/Files/files/79426583583.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/18551780837.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/66459074664.pdfIn PDF document text
    • http://dsfly.com/uploads/files/bovomom.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/42768847538.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/ug1cdotgogh33td27cmd2hifp4/38169261846.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/48291831546.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/32955730044.pdfIn macro / runtime command snippet
    • http://lg-palette.com/upload/files/kogobojewufura.pdfIn macro / runtime command snippet
    • http://efuturesthai.com/uploads/files/54206056913.pdfIn PDF document text
    • http://krzeptowski.pl/file/xekefikovokawiga.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/rexituxoxovasazafanumule.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/lazevawudi.pdfIn PDF document text
    • http://enkepharma.com/upload/files/roxoluzakaxo.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/xifijojo.pdfIn PDF document text
    • http://wych123.com/upload/files/vedagilidoxeg.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146ba9b1923b---22884193681.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/iIn macro / runtime command snippet
    • 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_off0000cf8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8C 18316 bytes
SHA-256: 5d39f60b68c75369f0209e93fabd6d6b624e1ed6089d44b0e36e3022e9dfc82b
font_01_sfnt_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 10176 bytes
SHA-256: e8d7ae2127fc7c80011fa5fb665fb4187425c5e76d19941a1cdfd441586e9dad
font_02_sfnt_off0001156f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1