Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae31262187cc080…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 23:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0fcddd47b8195fa93ce87111424c9e6 SHA-1: 988b24862de82f0c894b66162d2f4c8544f74350 SHA-256: aae31262187cc0801719d438ee75a36939404defe3ebceb9e6fd182dc6737f19
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to other PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to redirect users to a network of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=set+builder+notation+worksheet+pdf
    • https://vozedebilonede.weebly.com/uploads/1/3/5/3/135333302/jeradolageseb.pdf
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5ff693ec9b7ad.pdf
    • http://wugafis.66ghz.com/30769002991.pdf
    • http://sifinujox.sportsontheweb.net/45003046741.pdf
    • https://static.s123-cdn-static.com/uploads/4417029/normal_5ffb43175ec65.pdf
    • https://static.s123-cdn-static.com/uploads/4455387/normal_6005e6d91d839.pdf
    • http://salizurewaki.mypressonline.com/26949518042.pdf
    • http://nenonazuf.scienceontheweb.net/how_many_books_are_there_in_the_unwind_series.pdf
    • https://wujadagepixiv.weebly.com/uploads/1/3/1/8/131856877/kunesuno-bugegidodifo.pdf
    • http://bemigovoso.iblogger.org/what_is_a_supervised_machine_learning_algorithm.pdf
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/mivegakikifuw.pdf
    • https://static.s123-cdn-static.com/uploads/4530578/normal_600327b452b5e.pdf
    • http://gakukuketisalum.scienceontheweb.net/lakikekow.pdf
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/02b141.pdf
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/xonijizixa.pdf
    • https://cdn-cms.f-static.net/uploads/4471985/normal_6027d839d27e5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zifilobesumafi/39888301028.pdf
    • https://s3.amazonaws.com/bufexa/vehicle_damage_report_template.pdf
    • https://s3.amazonaws.com/donukadizolin/husqvarna_350bt_home_depot.pdf
    • http://tisenunab.rf.gd/4604735036.pdf
    • http://josunida.epizy.com/asean_variation_guideline_for_pharmaceutical_products_2017.pdf
    • https://s3.amazonaws.com/jolunenafobuw/roliw.pdf
    • https://s3.amazonaws.com/wolina/dalavijugosadoxusize.pdf
    • https://s3.amazonaws.com/polexebuj/research_interim_report_template.pdf
    • https://s3.amazonaws.com/nazekisigiduz/canada_visa_application_form_instructions.pdf
    • https://s3.amazonaws.com/xovajukoxin/85994985803.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7cc.bin
b18bd9608b41e94658daf02b2b899d35962e1599348d5c989be3282e76f3e58d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 5528 bytes
font_01_sfnt_off0000fa9b.bin
16f979638c694b246a64820a7c021296e0206e33a71c533e74c332e77e6709c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 11264 bytes

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