Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ccf769e7a7e4d5…

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 10:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5aa0a0a41e68daa3323ae2bae2da212e SHA-1: b5a1464835b76e5d6776ad0a801a42bcad8d2f80 SHA-256: 34ccf769e7a7e4d5ea535664ee971ba94b32643e16cfb57cd7da8ab2ad93da94
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links pointing to various domains, indicating a likely phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags the document as a link farm on disposable hosting, reinforcing the malicious intent. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://infrive.ru/uplcv?utm_term=download+mobdro+windows PDF link annotation
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/1a0dc3b7d88c632b08754375289d6bf6/44750064888.pdfIn PDF document text
    • http://samtekelektrik.com/files/vujizoduzutig.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/5ce791bbcd2ed7ce4f6a7f717135dfdb/wimexuximonurunozapavat.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/35136482025.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/14893707759.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/84942901572.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/48175398710.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/82911654159.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/19741634666.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/81396328140.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/fuwaza.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/mafokabutujekuwas.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/gilerunifasagowet.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/27461506611.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/mabiravobufapixog.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/raginoz.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/56937799786.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210911_D0220571766B3ACC.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/29997112800.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/77584112603.pdfIn PDF document text
    • http://intertravel.hu/_user/file/vijalifun.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/kagebuvekopezajox.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/muwelagaxuxi.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_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 10408 bytes
SHA-256: 86377d167113e812bc152974a85a5d9f7f8c909aeb8de0c4e7b872fdb292d959
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 18364 bytes
SHA-256: ba60420354316177c823e6dbce8b7870c4f755ea72307ce152c1748fce672dd8