Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b57b222050850c…

MALICIOUS

PDF

69.1 KB Created: 2021-09-15 11:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d4ec5539c6b6e3e60bbd7f9ee34de12 SHA-1: 69e99a03a1047ab13090165521aca4e11cb9a07d SHA-256: 30b57b222050850c1f731606c4309c288d32fc5b1a0b643599ef291421764e89
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://chcial.ru/uplcv?utm_term=my+lady+boss+tagalog+full+movie
    • http://esipro.be/userfiles/file/63364227166.pdf
    • http://samnakthodrahassob.com/userfiles/file/nogexivopuralaturazo.pdf
    • http://belst.by/upload/file/xuvazeforivemubumakov.pdf
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/finogusedowopesepiwibu.pdf
    • https://podimercrm.com/img/files/75809645944.pdf
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/lapug.pdf
    • http://stellarp.com/userfiles/files/15141379492.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cae444dcbc---vikad.pdf
    • http://abwhopewell.com/uploads/files/56862041289.pdf
    • https://namdolove.com/FileData/ckfinder/files/20210904_353F50BE53011B01.pdf
    • https://champion-osk.pl/userfiles/file/1847945285.pdf
    • http://aaaexpressac.com/userfiles/file/foparo.pdf
    • http://wsmr.us/userfiles/file/robovit.pdf
    • https://doctmcooper.com/userfiles/files/fulosekojulud.pdf
    • http://rdmsrl.it/userfiles/files/rabovoderogi.pdf
    • https://pamukoglu.com/userfiles/file/lejutoke.pdf
    • https://uzunlarpeynir.com/dursun/upload/files/37763902611.pdf
    • http://dongshengcable.com/images/upload/File/76183487663.pdf
    • http://ibarugi.com/fckeditor/userfiles/file/91253952279.pdf
    • http://santehnika34.ru/images/file/lumirasogolafakij.pdf
    • http://aczelzalog.hu/tmp/70776034568.pdf
    • https://lodoshosting.com/calisma2/files/uploads/niminemaxuno.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b15f.bin
ab1a2b6397b359b76908db10e1302f534228f7ca1e59a57452996e1061879c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB15F 14460 bytes
font_01_sfnt_off0000d5c7.bin
eec2c94235073b5667f3750b85ab066174980e1b7e15081f09f788df5ad8efe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 10908 bytes
font_02_sfnt_off0000eee3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 16792 bytes

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