Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7a0ddc0fecd5ad…

MALICIOUS

PDF

84.9 KB Created: 2021-06-27 14:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faa9e41e2e989e5b7e283d8a9f07afb4 SHA-1: 66f18ee0e4bfb4e29c81c57cc8fc30f5ae28353e SHA-256: fe7a0ddc0fecd5add138d724eb6f8f7250127fb4d63456689b10095eeba15362
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL findings point towards a malicious document designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://k-newsletter.com/ckupload/files/39032064161.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/14hiutrcqmi189h099e71t3pk7/mosovus.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ab772e0137ffd776da73521d97b60d14/32925020013.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/13d676f2f0fed4f2395dec7e14e04850/90299606910.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8e73b31db209f5d4205370e0ba07e9af/45687407551.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/a9fb117bpk09hv34eko8943dau/31300473119.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/377c40f2c1944fbae40cd7b13e5adedb/43440634728.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/806bd27612048318de888e6b999fe62e/48812422134.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/589ef732a4497ea561779d384cce3c08/gitegugikaba.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e87e917cd---vaguf.pdf
    • https://contabil-fiscal.ro/mm/file/wadasakimesifaleripinali.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8263372179---nofigino.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9f94c8ddb---fojipimerididevin.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/28830388007.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/8b4434b5b85bb3fc43c60e9d2c48b1b6/panikora.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9fb69f154---nedojukovilizu.pdf
    • http://malbreil.com/userfiles/file/bexabezatelatepezuxusulo.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dk5n2shokdj5vld0b8krefqcs4/josetezazogiduxedew.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e324401a89---padaxanawaravorixib.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/8889531370.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/o24t94slc77vem06d2e2ggh5f8/80639621264.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/d9b7jtrduk4jafn3nk4i054djm/fupanapariribusafizopozav.pdf
    • http://alhouti.com/userfiles/file/nutifizopikewus.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4591d0ebe---zomuputugafemozivisujox.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=adding+a+tenant+to+an+existing+lease
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e9.bin
9dc74535a6692f4260f0355970fcc7bc2a5c5af40b851cc3ce6f07945a46146e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E9 16076 bytes
font_01_sfnt_off0000e908.bin
c9193cc08d831372f70acec93cf46e2fd863d3ef07c2c6be68e42980b9323e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 17220 bytes
font_02_sfnt_off000115e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115E4 16792 bytes
font_03_sfnt_off00012dfb.bin
14b9bca0635c464eb93dddb1d54933a973d4b4d68f5d3e1d0a52d6da64868c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFB 10408 bytes

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