Malicious PDF — malware analysis report

Static analysis result for SHA-256 63454e7892980e4e…

MALICIOUS

PDF

74.1 KB Created: 2021-06-27 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0fafdaf7aaf92cf29fa8ae6424f74f08 SHA-1: fe64d7ca2a154609e19c648e30f5ac4ba0e3361b SHA-256: 63454e7892980e4e1d923579b82269a0ff2a00516bbeeedf516cfb633f07f622
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting domains. The primary goal appears to be directing users to malicious URLs, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be86a1402ce---pogedoxala.pdf In PDF document text
    • http://korvet-sp.ru/userfiles/file/13814126349.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/935iil8mp3d1c5bh1d9mqa3p8i/79930071957.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/wewimexerevulikotexinu.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d42455796f---23883223913.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/mafepagitususifumaxines.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/2e0550915966e1b199717a70ff2218cc/sesedofironafezaledagude.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/82043649929.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/magixolokug.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/2f07n9v54vhq2l513mjlq5hlfq/86992273957.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c270ab8c324b1fe580b875bbe96a3897/kuzodizedobuwuke.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/93904092204.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affcdd2a43a---95463935750.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/2a1e13f17d7af7c25fc98c142ef01772/zowimunusod.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cae78bbfa44---26086108410.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836c46c136b---xuwuxikiramitutisobir.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/gimutepesuvobe.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607113ab80edf---zuwamunezafixelipakofefe.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1609b49492d5d3---porawufinemapebosifek.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608323764b1c8---xujodelaw.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/57980059899.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/papuwozolederemeweji.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc8fd73754---puvizesuwadagojoleko.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d7345d9fd---nilejofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=suffixes+ly+and+ful+worksheetsPDF 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_off0000bec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC3 11020 bytes
SHA-256: 25dfafbc1d2f8318ed125af092e5b108000b6209d9badcba5da68fa28ce1b106
font_01_sfnt_off0000d862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 16256 bytes
SHA-256: a5fe579cd337ddc2b4a4df00281184bf0fbd0a77fd932f9265a4dac37f80321a
font_02_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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