Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fd26677534ed17…

MALICIOUS

PDF

70.6 KB Created: 2021-03-18 00:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 944ab2fc75e87fb29efc34cf33c99bbe SHA-1: 1992b21c5c5086d58416988e257bbc7f6ab08529 SHA-256: f5fd26677534ed1793edeb4d42a2e6c7297951936244b2c5abe1c4e1e65bd70e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/aws?utm_term=zmodo+zp-nl18+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394077/normal_60240c43e601b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446174/normal_5fedf9f992868.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5ff1e576d00bc.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/how_to_complete_certified_mail.pdfIn PDF document text
    • http://paxabak.mypressonline.com/36105360805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_601ed0ab66f63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5ffbf4ff43b7e.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/pride_and_prejudice_cast_darcy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fce4a90bc161.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/gafazemofuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/angry_birds_transformers_toons_tv.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/71666142622.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_71dd978c7e974c748cf2e1d09525cfcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/gijebo.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_b752ae1187134249b475ab281b1fb7b3.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_0f5d8e32a18143ffacfb094e148b135b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/nccn_guidelines_for_lynch_syndrome.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/canada_visa_application_form_in_nigeria.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_f55dea98189b476391967f960632988d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/what_is_a_synonym_for_making_progress.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_5f5054f6e9de4df0bb207e9a8e8ab69e.pdf?index=trueIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/walgreens_automatic_wrist_blood_pressure_monitor_reviews.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/giburitekokik.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD567 5116 bytes
SHA-256: d08acf08b93d2b263f4e3352213a23589810f0ea473bddcda2d605f092379753
font_01_sfnt_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 10828 bytes
SHA-256: a8e33a6f099e30d9071f99b4a29fc3cccb56f9b835380bab28eb52b19a3e0b32

Open this report in the interactive analyzer, or submit your own file for analysis.