Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc2ad074eae5ccb…

MALICIOUS

PDF

91.2 KB Created: 2021-09-18 17:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 17096e4e045f9a46c22816df8ed39e0a SHA-1: e482461fd9c079a41ead08126586f6949cdc9a91 SHA-256: afc2ad074eae5ccb112843eaebacb51142464d8c8da22572def111dfaa755d75
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and other disposable hosting. The embedded JavaScript likely attempts to redirect the user to malicious external sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://burragebrothers.com/demo/jolie/beta/userfiles/files/26574033106.pdf In PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132b90b44802---lefesegigoxodokemakedenev.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/dulopumufogedomaro.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/40566734460.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/tutumelumolabegusalapobed.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/50218388263.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/86172756161.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/wojavazesuzevukujofazaxum.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109032057014396.pdfIn PDF document text
    • http://saimiri.name/upload/file/gafiregu.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/wamunisamiki.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/tomoba.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/36547243843.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/begose.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/pajoliguvutit.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/627d2ea0d92f7de70106cb9c7a0053d6/miwovatuzadaborodoket.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99c06946a---15162450719.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/varamuzilogor.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/51416479451.pdfIn PDF document text
    • https://t-groupvnxkld.com/uploads/news_file/pamenozaridite.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/42869962733.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/54981222044.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/17148429961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=judi+slot+888PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4A 16612 bytes
SHA-256: 21b53d9d05f779182df21ebf073f6ff606920dde70b14f52787eea7beada81a9
font_01_sfnt_off0000e6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D4 10040 bytes
SHA-256: 8e6c4a68c07b0def90cf7ea0c75715bab4b63e0b949ea93235de43d49532cf0a
font_02_sfnt_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 26120 bytes
SHA-256: dbb6e6615f1b49e497d39c213a673a7c06a8d1681048df463d39d5e407b5a55e
font_04_sfnt_off0001560d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560D 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8

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