Malicious PDF — malware analysis report

Static analysis result for SHA-256 5006f86d9800f56a…

MALICIOUS

PDF

86.6 KB Created: 2021-06-27 02:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0272a1ecd268ee575dac0c2cc999c624 SHA-1: 7f4b12341762fdc54353fddedde04fe110c2fd42 SHA-256: 5006f86d9800f56a20224d26fd4be3dad504b532d1ac67a79bcf09e0425658b1
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final destination. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://alexlunacoach.com/img/editor/file/loxuserewegejita.pdf
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/25449419387.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/xowuroboxe.pdf
    • http://ccforum.kr/uploads/file/1622052296.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/d077202a61fd49e88f53221cdffc15cf/kuref.pdf
    • http://immopolignano.lu/images/13116024190.pdf
    • http://ackerviewguesthouse.com/userfiles/file/bepifazalakebotofeb.pdf
    • http://cloverpark1959.com/clients/51168/File/70015673098.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/vaaljea81un4d0uf7lmcln2glt/janakoxi.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b11387d3c383a1ea376515c1ff069d62/wozumusowapogosirovumut.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ddf0811d8---jadonekujelikuzagegi.pdf
    • http://rolmech-strzelno.pl/Upload/file/24861851193.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/56gmdfgss4batjodnob5csld9l/zamepifapotire.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9d83451ae8d8331f95bf3fed3ff8fa7d/pulorebamenulama.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9d5dd4334---buxeguliditari.pdf
    • http://fotografoenricogiampieri.it/userfiles/files/61344465195.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff0898cb9a---85115033733.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b06822ac1---xanizozilasipaz.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95230add1d---powuxazalati.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3083a0a7c3---28168752936.pdf
    • http://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/9402021547.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/90e2a051a671842d284385c76bdc428a/fokuro.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/f0k4qcavtmpvhasb9dfuov70sl/24150539549.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c4d1e8d0b76af374afffc48634fe3630/31523273444.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f284ddd15---20655037969.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=advanced+level+reading+comprehension
    • 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_off0000f215.bin
ec1cc9bbd88fb99e629615327838e9ccc6f18cc6d29c4f522025dcd598b6ec44
pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 10912 bytes
font_01_sfnt_off00010ae9.bin
c48cd215550e5fa59074c5316f38d429f8428f6ad50b88527eac0d2146e14130
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 16340 bytes
font_02_sfnt_off0001351b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1351B 16792 bytes