Malicious PDF — malware analysis report

Static analysis result for SHA-256 baed43a9f00b77e2…

MALICIOUS

PDF

87.7 KB Created: 2021-07-06 15:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 51438e1549f08e08a0f2722fe4ade7e4 SHA-1: bcb3aad7368936325d64caf44b177cc455593eac SHA-256: baed43a9f00b77e2d6c9aaf933c24f4a01f05d1253b356c9c275be85f5d73046
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to WordPress sites utilizing the 'super-forms' plugin, a common vector for hosting malicious files. Heuristics indicate this is a link farm on potentially disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://allamericannursing.com/userfiles/file/43575238912.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/vd0n2khnlv3g4hl3bk526gguo3/bomesi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5dfd6f86cf1545439b63b17eb85a5029/87350702965.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/1d80bed7cb376140587b4dabee7f1d7f/pidowamok.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/puvunajize.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc70a8dada---valipiriwum.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/taremugidinosimepod.pdfIn PDF document text
    • https://efnnma.org/files/file/todirarigufulezufibi.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/58955394540d9cc67dcfd8dd5baec93d/gaxudekesevizaxapoduwe.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/k2hsmludtn5ef12bna0rtlshvc/vufututovikexutovodegelo.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/75649860159.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/guvupezamepixobumid.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160d9041633bfb---60647964498.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/acd773db511fd6c2e7874d0b878ee236/tisaguxusavakajimonusa.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/gezokuluvepapa.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/93632110404.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ea4657dadd095eab54b6745d0a6582c6/40483427584.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/j1j9438rvqoleo7fdirscil742/mulaxuzagugizepikipadulu.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea2dfa0eb8---loweragaporaderodakiru.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xejejinajobajojekexi.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/kiwilawitusakofak.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6662eb79f---zorodavafedakeguf.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/todokesoxurawefap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=past+tense+meaningPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 18432 bytes
SHA-256: a080f2bcc43e1cdde015eea98dc60ef601ce0f743bd89bcec454e22c5f4c7d83
font_02_sfnt_off00013b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B25 10184 bytes
SHA-256: 92eb4e628ab97b1ceb16dc06cb56adf087074ebbbac5249595b004d9d9aea964

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