Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f8cf4b7c13f4e7…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 00:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 65e01f832be60e625f7605084719f1ca SHA-1: d9208e1e8e836da62877e87f5d35d6e0fcb58555 SHA-256: 22f8cf4b7c13f4e7598e53d8f680cb560c8e847024ce734236a8593dbb131e5f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to disposable hosting, characteristic of phishing or malware distribution campaigns. The PDF structure and embedded links suggest it's intended to redirect users to malicious websites, likely to exploit vulnerabilities or trick them into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=putlocker+watch+tv PDF link annotation
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/20489106789.pdfIn PDF document text
    • http://nscenter.cn/upload/files/zolajewemoxikeg.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/loresuralozedabejom.pdfIn PDF document text
    • https://adci.vn/data/upload/file/xetifugomukinozal.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/75037266561.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/mudemerixa.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/xutimozegifesanoti.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/melewipedu.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/zodileralulomupiw.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/vunatamaxodufuraturo.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/35521927705.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/40728795438.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/fotuziwegepaxuripodejoxo.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210911224915.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/79599125183.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/62185307526.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134fa6fe6208---fuzimumobasa.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/72781381557.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/dapolela.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/fapidaxagerupazozo.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/103721046.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/besimofetisol.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/kozudipusinulakebajudixi.pdfIn PDF document text
    • https://loki-season-1-episode-1.blogspot.com/In 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_off0000dcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBB 18096 bytes
SHA-256: d821216663bb843f9d74cb696cce10a26dbe6a6a0c7f0c974e4b1a0b19464405
font_01_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FC 10308 bytes
SHA-256: 96ec9802a2d0c854dac7ed93240abe24bf6afad1435e56e5b7b7d96e27ad3a19

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