Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06aa5568d94fa48…

MALICIOUS

PDF

80.7 KB Created: 2021-04-28 13:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 140a8f3cb7fbd2efce5a1203435606cd SHA-1: 26f9a85c3ea388d217a68fd960f7671bea315cce SHA-256: e06aa5568d94fa4893c3793b3106d6d2b030bf5cc4f23e7bdc09c8edafe1ff09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079340706df1---90493504969.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/b11e0f95a0c80aac22779d59816dfe41/36487739903.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4f7dd0414---mujamuxesav.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/b52a650a70001449c0b343c5e81067dc/27233263773.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e88ccd790---zejasagek.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/8d41d18c51c74a2c427209384b77f5ba/fekinimulegonenalelabixit.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/c0ac067d96b1d0c7bb2c32fe7edf0873/towexofeniwepiruduren.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771be5bc489---92793284668.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607947176670c---pesibaletixurap.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6316f9e9---36984367972.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/6j3vp957dd2ujf4i3ds7rt2t82/59888953919.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608633f0e8665---43276975429.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba6e479908---65891866725.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/pk08jp6am5eeca29lpdu71pva2/dimelexojufaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gre+calculator++mac
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b8.bin
0d0c56e9aec044bf0f0073784cb0e8b2c304dcff408a96368c817af422d06f80
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 4796 bytes
font_01_sfnt_off0000f0ec.bin
adaf76a7406d9b7bc9574ab7a5849e3b0d1f1964fafb19115772c5dc6792b2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 2552 bytes
font_02_sfnt_off0000fc36.bin
df56c672467f3434f994f80c21835f1a5dc795cc2db1c63654ad251e70d0aee6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 10248 bytes
font_03_sfnt_off00011f6b.bin
1b19f5b9ae2aeff7929e120295d9aee049321614abc14b3ca723126b23f9dd5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6B 16416 bytes