Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d359d251c13bf3…

MALICIOUS

PDF

77.8 KB Created: 2021-05-28 18:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 06192dd72f43474adac2d14e5b6bae6b SHA-1: 0bbdbbbba29941b937ffbaecd0f4b654684db2c6 SHA-256: e0d359d251c13bf3ee70e6c930bf411bcc6e116039c6f2befed9012d98faead5
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

The PDF document contains a social engineering lure, specifically a 'ClickFix' attack, instructing the user to execute a command to resolve a perceived issue with Adobe Reader. This is supported by the 'SE_CLICKFIX' and 'SE_ENABLE_LURE' heuristic firings. The document also contains numerous external links, suggesting it is part of a larger phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://lozipotod.ru/strik?utm_term=adobe+reader+dc+freezes+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5ff08afc47e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_5fe62c8b3d042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_605be08748a62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fdc1b0eed242.pdfIn PDF document text
    • https://fafapiponuge.weebly.com/uploads/1/3/4/6/134692005/ripufetilesak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497344/normal_604d22fb31793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481993/normal_60531edee7609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_605648af2b64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_60646383d98bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_603bf0671056f.pdfIn PDF document text
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/92e5b6a515a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5ff4b2eac24ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460057/normal_601ae9c57516c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369765/normal_5fc67520bcaf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fcd0c4beb893.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/e3278a4a-549e-4e56-ae9e-a4f373055662/portfolio_cover_design_templates_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e528a89-6134-4d2c-bd83-c19c221f9ba4/how_do_smart_scales_measure_bone_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9deb07d2-0f9a-4d62-b84f-e38a940bd457/pinixamete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5480cd-ab65-43bd-b4c2-3ad411460976/goranoguximaxaxoketu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753b1508-745d-48fa-8076-5d4812780066/ruvilisusawabedewewikatok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05ce148-219d-454d-a22b-8e81520b0e88/osmanl_devleti_kurulu_dnemi_kpss_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88d1625-6030-4d71-909d-75eaf4e93853/ap_human_geography_textbook_free.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_off0000eecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECC 5448 bytes
SHA-256: c3a7ed118fa6c6c63a95471e3bba1b0887de62660a97bd57fffd1d479726ca02
font_01_sfnt_off00010183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10183 11984 bytes
SHA-256: 11d468228210344713a5ab2386a2609c8e87097f186f9236e9494bfba3e63cb6