Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5b6fee655b4265…

MALICIOUS

PDF

90.6 KB Created: 2021-05-03 10:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1ceb326fbc244b676b0952062730d741 SHA-1: bdb56825dff420b25f52aebf075469277272482f SHA-256: 0e5b6fee655b426577b996f691acd6dd5cd0af334b26c9774820559b5ecd68a6
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely using embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=battery+tender+junior+charger+and+maintainer PDF link annotation
    • https://vemesefopega.weebly.com/uploads/1/3/4/6/134684253/4085327.pdfIn PDF document text
    • https://bexukisutiso.weebly.com/uploads/1/3/0/8/130873741/felewutodu.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/27543345282.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/652547.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/natural_causes_of_air_pollution.pdfIn PDF document text
    • https://susulipazelavig.weebly.com/uploads/1/3/5/3/135335994/zofigexivesu.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/28814336499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9bdcc0-705a-4419-8b2a-f03dc4bca35b/how_to_make_anointing_oil_with_olive_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/the_adventures_of_huckleberry_finn_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bd44e8-60a1-443f-ae2e-8694b2db0201/jozefutubowipa.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_93168244e01d46bda30c616845de4f72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/restful_web_services_for_beginners.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_c62c226dc01240c4b3e49e43c8741faf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/96361350935.pdfIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_260f0f656e33435d8750dfd7d7417e28.pdf?index=trueIn PDF document text
    • http://nufudojor.epizy.com/gamutuvidavi.pdfIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_7f3ca2caa8884ff88830617f7dc1f878.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/507b07f0-ec15-4e3e-a020-a6c4dc6f57b8/how_to_talk_with_lover_boy.pdfIn PDF document text
    • http://fisuzes.epizy.com/45777434208.pdfIn PDF document text
    • http://duvugagaxanawag.rf.gd/atlantis_the_lost_empire_full_movie.pdfIn PDF document text
    • https://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_d38efdef41a04687aa5bf78f1a6d9f7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/does_potassium_nitrate_incorporate_ionic_bonding.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
    • 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_off00010d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 5368 bytes
SHA-256: 9bb19ab2bb33dc767a07b7c4dc861888d23374c8aae2185e4d0ba435187caddb
font_01_sfnt_off00011fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAD 11324 bytes
SHA-256: 00258ab8cdd4c7ebaa2ef02c26d81346698272c98e3e731c2465b7d6a7b44f2f
font_02_sfnt_off000146a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A5 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501