Malicious PDF — malware analysis report

Static analysis result for SHA-256 7055b695ec9f9cfe…

MALICIOUS

PDF

89.6 KB Created: 2021-06-25 18:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b9b0e6a5d30dbb971ef20817e9c86a13 SHA-1: 0030efbc990550908c72728d058b4471f3571c5b SHA-256: 7055b695ec9f9cfe8b9e0100f637a791e8a854dce2ff64232df1282590217a22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=free+hotspot+for+pc PDF link annotation
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c4d1216c7---gosiwolapusujibone.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ereof1f0d8gf1r0tfq3772ff02/95579631917.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/61806520524.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607df408f175d---katadolegalevok.pdfIn PDF document text
    • http://medica-brno.com/files/resebivudalawebuxinapu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a11cf37f611---nevuboze.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/ponepedakedakulekonatazaf.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/xokaraxu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a3f774176ae36a9464577dfba54a4f68/wexubekujipux.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716240ab20b---71217149692.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d45d2391ed---vedokemaxulekuruwebeperil.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/854e0596a39bc32f317cc0df6f171f15/40341647624.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/anb0tsnkau4416v5qvo8npko75/xivobirekadidigatavoxoj.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/435582948911621058075.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1a02ec7da---34365112544.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/l11d45hu25h9gn7bqaqgf6ruc6/zaletewobotunuguxaxebuv.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/sijudedevuti.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/577f835030b9a3f9e6f20dbcd66ac54b/dulotevowukepape.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/129ddf2c3c65a69c99f03bd90e0e5186/55527091753.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/bolikovegokuweso.pdfIn PDF document text
    • https://digireg.sk/upload/jojazobigodefujidezikeg.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/geboxuvufowo.pdfIn PDF document text
    • 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_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 16852 bytes
SHA-256: 0804245ad27ccd7a152fe684f334779cda59b8b428806092809caffc89187185
font_01_sfnt_off00012a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14252 10152 bytes
SHA-256: f011a6bcdedcb557af630f6f9f97cecdba7d98d06c07a4fd4cfd1f606f2b9702

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