Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f7f77adf0afa66…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 21:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8d1898ae7fa5a6c153ca7223721ca6b2 SHA-1: db345ac43bd9bb20a815a148d626c7f6533cb427 SHA-256: e1f7f77adf0afa66e1a9672755f41ab5766fee819e90bf11e38c8d2f6c26d6f5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://garglob.ru/uplcv?utm_term=how+to+enable+voice+navigation+in+google+maps+android PDF link annotation
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/gutok.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/91234599498.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/26360768753.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/92609005518.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137e04487f4a---kuzagepumepadow.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/rozemowijulelidafa.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/20703626426.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/29504863383.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/ziparijedodoxode.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109101300036703.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/80686421167.pdfIn PDF document text
    • https://unitjaya.com/contents/files/79028041249.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/80333210333.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/mubewefaxijabawapapakax.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/lubivodat.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109191737392571.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/tagokinedamoxe.pdfIn PDF document text
    • https://xlquality.com/userfiles/file/purodokavikexiwerikebizu.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/46775403909.pdfIn PDF document text
    • https://moolans.com/uploads/files/51479049491.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/voginavipulesomigapip.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/98596345116.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_off0000ad48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 14460 bytes
SHA-256: e9b187d80f233a79e6f8c28fac5b10ad37bc39e943a954e6d970341a368fcd7c
font_02_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 11140 bytes
SHA-256: b7718a3536b7e3677ac5a5163d686807c5a74f4e27aff1706cd2411bacac5f31

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