Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9c247e418e8613…

MALICIOUS

PDF

69.0 KB Created: 2021-09-30 18:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8a70122877ebd40b998dcb7fc924507b SHA-1: 7bc9078d36027f8db3f7f231f714b5fb72391c4d SHA-256: 1f9c247e418e861348c52ecd68f85c76a8b85f848cb6beea4f4734d5e4857739
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, despite some being marked benign, point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://condosworld.com/abisol1/userfiles/files/77780448241.pdf In PDF document text
    • http://uptownfallschurch.com/uploads/files/96882125675.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/tovumitumefasereme.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/88606253314.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/34560036542.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/zenedibel.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/powamuvalawezomirikogi.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/xuleborurivozugomamit.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/77984892351.pdfIn PDF document text
    • https://tuinvandecruys.be/file/18881822910.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021093017010553574.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/kalagevesiroj.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/lewisurim.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ff8b694560b46c55b0b4b325abbd6df3/bufonabokozebevidiza.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210915182025818.pdfIn PDF document text
    • http://homeopathyhk.com/files/67158612192.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/88957379746.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/37102714539.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/lakasozesezonebinizadi.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/35659682253.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210913061118.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/55185705773.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/36170088743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=top+paid+android+apps+2020PDF 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_off0000b0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B3 10312 bytes
SHA-256: 5d7153472b2f90ab0bee3c6e70390b2e2cd5c8145a8436b03d1b526f3ba5f7f3
font_01_sfnt_off0000c807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 15336 bytes
SHA-256: ca6014a1949bf7a7bab88ff7448b2ca173f3d3a63c5062f3709bb9c1aa177096
font_02_sfnt_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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