Malicious PDF — malware analysis report

Static analysis result for SHA-256 020d0274c1eecae0…

MALICIOUS

PDF

155.4 KB Created: 2021-07-13 18:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 28d8088ad0e8c0b6193f713f7351bfe8 SHA-1: 6c6b60fd619cb544af8f07d9dffea0ca7a880e7a SHA-256: 020d0274c1eecae070b51ebeaaa9854e546b4beb98018146c7670801546183ef
96 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple websites, many of which appear to be hosted on compromised WordPress upload directories. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to manipulate search engine results or distribute further payloads. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • 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://evermoral.hk/upload/file/1625858044.pdf In PDF document text
    • https://alate.org/admin/fckeditor/editorfile/16545969942.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/borakab.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6290c3c4c10e8efe09fc2cb99e80dab8/1265037781.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077147b96c42---dogar.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/v2pu0lok5fuoppohgpa7asntjt/94944934955.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c40164e38f---59486946819.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/059dea9968a4444b3ac598fffac70494/gedaxuwujibujux.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c653e5dc0---66703646921.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/fb91eb4f27a70f9c83877536ad4f74ba/67637539728.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/pivevamepogaf.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee77b65544c9570f3b27496067c2c070/busoxufezetilo.pdfIn PDF document text
    • http://araonline.hu/uploads/file/wubotogofubovija.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd526c19c9---77131638119.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/79cns7tfbqsk1c7fsug69u57h0/11081768647.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/nf16nds8cifklfc65lts64gfrs/sodaminalojexudunumagupid.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/fopijadazegejos.pdfIn PDF document text
    • http://heizler.hu/files/file/wagorisodare.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/1c64ee17e7e3290c40de7e451c4a1a2b/kekatopefojabofafekejosap.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc709704f0---matonil.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/1153153586.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/7e3a631dbd6f3c0cb8297187f4aae3f9/rorosos.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/valupibekugakimif.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab61042c33d---91876568240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=chapter+one+great+gatsby+summaryPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000200fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200FE 10944 bytes
SHA-256: 780b867605378ed097b2a9a673b491b5f7f5e1dac104aa89da9022067144fc0e
font_01_sfnt_off00021a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A0B 17692 bytes
SHA-256: 2f62682f156cb0accd2335b0645b49afe679ee538b51e305c9711e711181045f
font_02_sfnt_off00024796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1