Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c2a6dd2148e2f2…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 06:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 38a22d6f81246c8950e35b9f99666e4b SHA-1: 4c932f50769159f336306d9f0a281530f6bd2ddf SHA-256: d1c2a6dd2148e2f22ff16ef9705f7c3b354907ad75885958f4a8612717c0becf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. The PDF contains numerous embedded links, many pointing to disposable domains, which is characteristic of a link farm used for phishing or scamming. The presence of these links suggests an attempt to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://aromacosmetics.bg/assets/userfiles/file/daxadumusofomesum.pdf In PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/vulewanujaxewuvalijob.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/luzemoduxivewezelojafakor.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/gizovonivakarir.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/29540817567.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/5024529880.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/xedesoroxukid.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/lozuvaramuroworete.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/23451779162.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/dipapemavolugarerenu.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/29684942989.pdfIn PDF document text
    • http://amdind.com/userfiles/file/95886939691.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/72051514673.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/44162959022.pdfIn PDF document text
    • http://okvin.org/userfiles/file/25429809037.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/zefalaf.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/fegobisasalubinumo.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/dadenajunumudufifuxuzodo.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613243da7c400---pagot.pdfIn PDF document text
    • https://bataretak.com/img/files/file/61465751988.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/54072718095.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/bekenadelutido.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/45506816537.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/49549791471.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/sajadi.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-16/20210916024957887775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+do+i+turn+off+voice+assistant+on+androidPDF link annotation
    • 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_off0000d496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD496 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 10664 bytes
SHA-256: b848d7fdd66ad7c8b188f0cf90130fa636b108673a1bf8e024f05666780114e6
font_02_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 18360 bytes
SHA-256: db384b61a5f32ca4ccb2ae19ea95051696cb160412ecb85bc224a7b93d439db8

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