Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e29c604189e2a32…

MALICIOUS

PDF

85.5 KB Created: 2021-07-07 04:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5009ea071852590031abfee1c55b33c SHA-1: ed83dbefcfe53b103ca04998259ed70b93e70f36 SHA-256: 8e29c604189e2a32cbf5240e53c4b50f04957bb15e58ed1c1aab78a3e6afe40b
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/19vaf2lr0nfuktubbhd8m6anh7/xitikixevo.pdf
    • http://afgventuregroup.com/cfiles/file/xovomeburotilozupug.pdf
    • http://markasib.ru/ckfinder/userfiles/files/gufenolaluxafawapi.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de881fbbdd4---zulekogofu.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7kj5njno2nqsp098s2nasgarjs/juniteboponuxevin.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/80983d4db3db5929c5541cfb7ebe6b3c/rifenafelugazovimejiz.pdf
    • http://newo.ru/files/files/39132321761.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/h816i9jv7tbhn7vph29ea55kgu/wisosuruzurupakewe.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160aca0158c042---91014781706.pdf
    • https://ajitcoatings.com/uploads/vidabilod.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4d3a32e7eefddf603b7167b652c7ec90/lanelobopapifupax.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609842671c1ac---sewazobu.pdf
    • https://actor-conseil.com/files/file/gobagaruwelu.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/tub9msv9bpgcvj1lccobgkar29/vagexifuzemogedagil.pdf
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/47901709430.pdf
    • http://feriaalainversa.com/uploaded/files/51728786808.pdf
    • https://a2designbg.com/userfiles/file/99289478543.pdf
    • https://galerie-louise.be/userfiles/files/37563410971.pdf
    • https://rcot.org/userfiles/file/14856645536.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bffe153ddd3---matarexadarasewazukirafob.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099f974c3442---jusuxepenapuwavukozuvugad.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/15959978777.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=my+right+back+hurts+when+i+breathe
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd2.bin
f28dd2a45ed75ef29bb0e51e3674d14eab7ef6f88ceda8e72eede780925833a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 16772 bytes
font_01_sfnt_off0001173d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 16792 bytes
font_02_sfnt_off00012f54.bin
b34c9dfccc49241424a0e674d451aff644f43e86f22998bb9f70554390e8469e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F54 10868 bytes