Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8b730b4d0c508b…

MALICIOUS

PDF

87.9 KB Created: 2021-03-29 08:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d2e9600d2519ebd442ded973c06765e4 SHA-1: 1d0a5914492ad95af8b930c086d370f886b7571c SHA-256: 8a8b730b4d0c508bad761a6b376538572315933c7e6dc11dc559cb1d385ab3cb
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one specifically pointing to 'soxebez.ru' which is associated with a search query for educational content. This suggests a phishing or credential harvesting attempt by disguising malicious links as legitimate search results. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=pre-algebra+with+pizzazz+answer+key+page+173 PDF link annotation
    • http://kufafukedexepix.mygamesonline.org/61764128325.pdfIn PDF document text
    • http://fb-ig-violation.com/what_is_the_central_theme_of_the_story_yellow_fishmi55p.pdfIn PDF document text
    • http://nonretloli.site/7638179067789am2.pdfIn PDF document text
    • http://scarcebook.com/60587921399c06rg.pdfIn PDF document text
    • http://vasaxemozofinu.22web.org/ladusigutalipanaxoriso.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/tefulejekenulonelaroboma.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/motorcycle_man_kristen_ashley_chomikuj.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/manonoruzax.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/d3695b6f-48b3-43a9-9995-5a4e8098732e/convertir_500_gramos_de_harina_a_mililitros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba29e82-c14d-4881-85c3-3cdb5e7f7b77/how_to_field_strip_a_taurus_pt92.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/16566299044.pdfIn PDF document text
    • http://zuzofigub.rf.gd/dimovuvanavakuj.pdfIn PDF document text
    • http://nofifejagarenut.epizy.com/32878088415.pdfIn PDF document text
    • http://tirujukixiw.epizy.com/kidogupofuvojeta.pdfIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_c219e5efe6054cfabdaeb08c2c5ab6b1.pdf?index=trueIn PDF document text
    • http://kipazafar.atwebpages.com/verbos_regulares_en_ingles_tres_tiempos.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/nirelurak.pdfIn PDF document text
    • http://bazokupakem.epizy.com/anet_a8_power_supply_upgrade.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/75659805600.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_780d1053db6f41419bd034ac99b7c905.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_6a6d1dfa6de14e22bdf7a2d75b67a842.pdf?index=trueIn 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_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 5860 bytes
SHA-256: 800503e9affa187bdfedd7785f6b70c492ab3e56aa6ffc0c09bcc04f2265ad37
font_01_sfnt_off000114ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 11032 bytes
SHA-256: f0497d535800373e7aab9cda98462dc575a7b7347ad9cea848067444e55eab5f
font_02_sfnt_off00013a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A86 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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