Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62b35d62d57f5b7…

MALICIOUS

PDF

69.9 KB Created: 2021-09-19 05:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f0874a37057dcf4046e7ee3914875637 SHA-1: 8e19a858f2d2e441739a6008847d8f93d871f7a4 SHA-256: e62b35d62d57f5b7712a868c2de85ad2d251890e8149b2bf4c4b1fe2ae12a612
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The presence of these links suggests an attempt to direct users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=call+of+duty+mobile+apk+obb+garena PDF link annotation
    • http://jrmhandling.nl/upload/file/goxuganaluvedep.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/951122107.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/97269352133.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/161e6a47316aaa765cead61df0f7827f/10944186144.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/vevisebiwilit.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613994379966a---pafaxanujaful.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/18795721223.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/betibalisawi.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210915_020506.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/36262584006.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/bagep.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/75704987891.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/19844977285.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/98651795381.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/2057151806.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/xatixojaxaraguwezidazerur.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/16790244246.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109111450067808.pdfIn PDF document text
    • http://geotersrl.it/file/34875871020.pdfIn PDF document text
    • http://valosagoskincsesbanya.com/upload/file/5123902107.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/60774323699.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/xuwitowetojadavaralel.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/6c6l52bg5jmjvdvdl9p5vo6mv3/sazitejiw.pdfIn PDF document text
    • https://fivetc.net/uploads/files/mafozazujigebuvule.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_off0000b19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB19E 11152 bytes
SHA-256: bf33189be0dea3606404edd0d79034c3ba1433c3f26d9507378d75a556f7dab8
font_01_sfnt_off0000cb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35A 15204 bytes
SHA-256: fc0ee6491db3b2ff04b02a72f5b5f2b3d3814e7335e9324be4ebfb034e6bdb18