Malicious PDF — malware analysis report

Static analysis result for SHA-256 3309ae0fcc12ab2c…

MALICIOUS

PDF

91.0 KB Created: 2021-07-15 11:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee95e18da370f69875930b34226c223c SHA-1: cd55f1bf0b96891a342a764dc618ab13433f3f01 SHA-256: 3309ae0fcc12ab2c756815f2fd5cfa28683ddd45c853553b60f3d3021c2bb10d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The PDF structure itself is also noted as a link farm on disposable hosting, further supporting a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/e717dcbf58d76b5fe2592233049563cc/3252287565.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/6ee804766a0d6bb5315f1188626de0a9/woluwiruvedus.pdf
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/41506787374.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609441a0b8327---66281008696.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e2f44f3ae501f05a6fd57cfef6828b4f/wiluluvidadewiditubonos.pdf
    • http://aaaexpressheating.com/userfiles/file/29051426733.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071281272e9b---75952422365.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b270918ff42a8021f07f32b466cfe6b4/9096225706.pdf
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/kikonalovolofero.pdf
    • https://al-farh-iq.com/upload/userfiles/file/54767642011.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/8fe516f3885c3e39accbda3f72c65f5e/gipuxedekowub.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0f8c73107---nedutafupakefolon.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4ksv3c4ejc1d0aak1hproa5luf/6534430349.pdf
    • https://nevisnews.com/userfiles/fepajibosuxutafa.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ffhcdn3bdf0a14v8j41tugoe4h/76501148602.pdf
    • http://muzeumostrowiec.pl/obrazy/file/suzejixoxasonusowe.pdf
    • http://rallyteamwalraven.nl/file/bofetujuxosumidaromow.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee4d29875c---47653820419.pdf
    • https://tennis94.fr/img/pics/files/45674554150.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/tdkij57cpi3nie4ooas783l533/27454815077.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/0dbmp7vgt9me8g0ghcfu855a0f/piwenaxuk.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=characteristics+of+applied+research
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fefa.bin
644bf6417a43414c51ea1f276764983a7da54ad4a51006b02275cbe4a07a2645
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 10644 bytes
font_01_sfnt_off00011778.bin
0827d0a243ab25c326a9f4d6bbe677b43b8744bbc5da0fcea9a042f4ec21a7be
pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 17460 bytes
font_02_sfnt_off0001455a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1455A 16792 bytes