Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c24d72b971524b1…

MALICIOUS

PDF

74.7 KB Created: 2021-06-19 23:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f619d07ae0fdae0d539c1927c443ec41 SHA-1: 6af7076c38f98b82306fb8c0ddefdac1a5ec1484 SHA-256: 9c24d72b971524b10f4d23b6dda21c0bac480f268fee9ee1d7179f38c6a23dfe
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or phish users. The embedded document body, though heavily obfuscated, contains text related to 'song download mp3 alan walker', indicating a lure for potentially unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071b9e28dc1b---22029797830.pdf In PDF document text
    • https://adikketiga.com/contents//files/rojemumevubivojukipobapiz.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/av3s729sms1i5l4gc3dd5b6l78/wadezijinetebigusasajurin.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/87fc15eb1e9e2ab6f738d92edf6b0eb8/12547349924.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609016e9a1a5e---81105134691.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3663b2aed---soguve.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/25404696898.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/gojarumomarusixari.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/tesaxasigudisesaxasosakog.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/687451f923b503c5e2509818d9836425/mudesuxivotamu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8d8564d9---gelaluzapumarafov.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/jubusetamevufugojudesew.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b6396539ca0---vebetewisisananinolorufi.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/4k9ob7oeh9l0dq4u2j38070md4/gupulejogosedidideniva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=on+my+way+song+download+mp3+alan+walkerPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 5728 bytes
SHA-256: 82cf94092c480c34704685d72455dcae3c5706a35fea551a6cab6a87bbdef25f
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 10892 bytes
SHA-256: cd0a35987635c0349e0d6aa461d5ec00c6d265d26c6367755defb9e1dc7db197

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