Malicious PDF — malware analysis report

Static analysis result for SHA-256 391eac50ac6378d2…

MALICIOUS

PDF

115.0 KB Created: 2021-07-05 04:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 282b8d826f042fcbe29292926194e6d3 SHA-1: 15b9c124608ca5711e9faa34e6c0785ea47b7957 SHA-256: 391eac50ac6378d221b22b03ba13c3b62ca45749a5de305136a595dfc74b8d97
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of link farms and compromised CMS uploads suggests an attempt to disguise malicious links and distribute further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe997eae6---lifipepavaloguxuda.pdf In PDF document text
    • http://servis-hradec.cz/files/file/ruwav.pdfIn PDF document text
    • https://drlanda.hu/user/file/mepixujimamukitufuta.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210626045816.pdfIn PDF document text
    • http://mosjob.ru/images/file/vidupobilobiwoxewewone.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d5674f1f130---69089013339.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/fujujivaru.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/a1aagssqs51cglv3ci5an4numq/46604985889.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/zujak.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/51514612655.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4gfvi4254nneind6n6oddvheih/19623176147.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a2e1c00a4900a9a3102613a87919ec63/89172336441.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ded005db287---1750991210.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/b6fac2f40f3b73709b01ebb8d7e8ce4f/28745102236.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/ss20ii2ns3q1b49ubftiaumu9j/demilegivedaviluzisajoru.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/20709434859.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e70b7cff6ae766f5edf53e989bf43e60/91232860704.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/wosamepe.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/48522639056.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/titinabopebemone.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b4c7433424cc496f07904a5a94b82814/pofizefakewewomuzexanuw.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/vavujafibawibe.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/lawisanozowewonif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=oh+allah+protect+me+from+hellfirePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016c26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16C26 31472 bytes
SHA-256: 3392137be1dbb32fd15b5008e63e889edcbce0fe26140f8c50c7ff6ed3cd112c
font_00_sfnt_off000126bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 17424 bytes
SHA-256: 6890eca3202ceccc334739060643333cec78a17291efd906c3a93239ba1849bd
font_01_sfnt_off00015448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15448 10496 bytes
SHA-256: 8ee95d1282de0ac9c9392e3e265df63efcc9a4a7a1a2d1999d8859b58ec4df4b
font_03_sfnt_off0001a46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A46E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.