Malicious PDF — malware analysis report

Static analysis result for SHA-256 2002fedef36f7f3c…

MALICIOUS

PDF

87.1 KB Created: 2021-06-27 05:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d3e263184f01c607e9919b30f35579f SHA-1: 0c8d622b19736c69b0592b2decda8305214c85d7 SHA-256: 2002fedef36f7f3cbaae792cc369c480daa22c4b2b82edaf910bed698c258dac
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages. The ML classifier strongly indicates maliciousness, supporting the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://nomylo.ru/uplcv?utm_term=fte+cost+meaning
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079564fc687f---54557764880.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079492584a9b---1140143185.pdf
    • http://cleangroupbd.com/ck/upload/files/numaserodiwokasifiwana.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/79130146000.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/488396eae5315adfc640cf4691a141e9/53162459038.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7535941d03---kexaluluver.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/vrf6v135k5k6df0qfbascjb9tr/nutajubozijerut.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/tghpcci7h7amik6c3vi5aq1o29/bedimusojoralubufamokiso.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160715b7d34836---4810105794.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2903cd7ab740c56a6a77591be216bcf5/63558488041.pdf
    • http://akinmedical.com/uploads/file/zopipomo.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/79749dc384598f777e9b19f6a8976590/wesifibif.pdf
    • http://bayanairag.com/uploads/userfiles/files/dutuzagapakuw.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e1970714---tezukebuzaroxexaki.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/c9s76p2fhcov58dvo4471atfgb/98877408441.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/00278b5e669fac10260899d807930de1/18867221428.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d67rh8c36ed5ncfaetcg2fna6/93397563104.pdf
    • http://21cedu.com/pds/userfiles/files/gamofujitakuxaj.pdf
    • http://sungsam.net/userData/board/file/20760795263.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d85d131371d2882f476d946fdd4a3ef0/nosivimup.pdf
    • http://dzbnf.com/upload/file///sojaj.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b631c5bb32e---pagiripomukobebufubef.pdf
    • 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_off0000e7e7.bin
282070e8fe69ceb4d346b65774dd8d477334d1b781cca095499dbac7fd92d88d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E7 17800 bytes
font_01_sfnt_off000116ca.bin
97a693020a9c67c913fa5abf5d83a61848c846aa130c5182d8e66f233602b60d
pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 2044 bytes
font_02_sfnt_off00012019.bin
267c29285564487495cdd9d6cb9c11c7ace02034c1866840293061e1d63e342e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 10404 bytes
font_03_sfnt_off000137af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137AF 16792 bytes