Malicious PDF — malware analysis report

Static analysis result for SHA-256 238b83f077e97a7e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-10 00:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d66020c7cf95a224589dbaabd099919 SHA-1: 9f719f9a371fc7a40066224d5f98cb8e2fffc688 SHA-256: 238b83f077e97a7e391bf6b3428c13d0d3ece7bed70b0a9fdeba11e162a53a25
126 Risk Score

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 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=bersa+380+thunder+plus+iwb+holster PDF link annotation
    • https://bageribo.weebly.com/uploads/1/3/4/5/134592059/5570370.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/hp_officejet_7510_remove_printhead.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/numidobovixutoleruzuziruz.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/mpdf_page_break_inside_table.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/87521fad4b1b.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/4736106.pdfIn PDF document text
    • http://tonilakifak.mypressonline.com/ampas_kopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefetuzuzip.myartsonline.com/4736632715.pdfIn PDF document text
    • http://visunes.myartsonline.com/71989588367.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/45494333368.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/xiloturafilebuzora.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/general_anatomical_terms.pdfIn PDF document text
    • http://jomopizemiz.onlinewebshop.net/speaking_english_as_an_american.pdfIn PDF document text
    • http://mujebik.atwebpages.com/celestial_navigation_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/bumomukudatu.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_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 5828 bytes
SHA-256: c0ef151e05352fd7563bc8c6e1d6fd140d38bdc2055f236aa944b84a03274d57
font_01_sfnt_off0000fcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 10412 bytes
SHA-256: 7f79a8704c14e2780938529672b2caa96a294d5c88f6a29859293cf1463b2b1b

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