Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb48863c1267a5d…

MALICIOUS

PDF

99.8 KB Created: 2021-06-30 05:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5764871738e9e5c481de1194fce6bc8f SHA-1: 0d85b0615169980742293adc06fbc8e3f07eb44d SHA-256: 1eb48863c1267a5d9ca1c330d19d05ebe1f01d9a6ca341dd4fe5981411f6aaa5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack by hosting these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=the+glory+and+the+dream+pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d2892e8942b3ae647c430191838aaa72/suragupupobexe.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a0cbbffa---70548110598.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608b50a9e4cc8---pomisibowasoxafalodeni.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160871e0c5fd20---niwasezazusalozuwot.pdf
    • http://www.siposferenc.hu/html/serifuwun.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722bff2eac6---51899485332.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d264bf2ba---wokavokivupidadexa.pdf
    • http://france-ex.com/images/blog//file/11489350131.pdf
    • http://amctop.com/board_data/editor_img/file/202105171357.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2eaa8f8d4f9ddcc3bf1ebb61f753eeef/pemojekizuwasefitevasafi.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe3f968ae---74999549909.pdf
    • http://cosmic-kino.ru/sadm_files/wobugerogagapalowobob.pdf
    • http://keyflounge.nl/userfiles/file/27086734060.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091ca154f5f9---xigumolotajo.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b61cedafb---ropebawufumefitifirizi.pdf
    • https://samudra99.com/contents//files/gozesim.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c9ef2ef55c6b64c57cfe462c7893c06a/58939702261.pdf
    • https://afayl.com/userfiles/file/ropizesozelidefuvagus.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ef701eb7c---situz.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/8cc011e1f85c79d786db5d6047a7f2d7/16157982300.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5bcd0dba4---6666135572.pdf
    • http://uforoi.com/app/webroot/uploads/files/42829360960.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c30f06585---57661289450.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/6ebq47uf5oqjb7vehn768s1uo6/54741714496.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012411.bin
8945d2caec4a39aebbcd70b109e2ae6f67a24ec3a91a28a412846cd9cbbfb996
pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 10760 bytes
font_01_sfnt_off00013c72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C72 16792 bytes
font_02_sfnt_off00015484.bin
90b739405078abcfe1845f4bbfb5ecbd2b75256912e3dac56844aa2f3f3b2ea7
pdf-font-stream PDF embedded font (sfnt) at offset 0x15484 17528 bytes