Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bec29f5cceb2a6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-15 19:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8381d2f7632406e5e4eceaf6a62ea052 SHA-1: 6489c68d3413ae696b5e4cc19d2c38d9e982f10b SHA-256: e5bec29f5cceb2a64524ca0c4f57c2fd4e9b1b605a9c40174a4df690e69a89dc
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection for a phishing trojan. The 'SE_CLICKFIX' heuristic suggests the document instructs users to press Win+R or paste a command, a common tactic to bypass macro restrictions and execute malicious commands. The embedded URL points to a domain that appears to be part of a social engineering lure for downloading a file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/award?keyword=convert+large+pdf+document+to+word+online+free PDF link annotation
    • https://cdn.sqhk.co/juzilolawu/idhcH8J/95111507337.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/causes_of_peripheral_precocious_puberty.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/bubimozokokoboxoxomuboban.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/suvipamid.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/molarabegexefuzumiralu.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/76994683544.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/zgdnU8Q/new_mathletics_student_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degagaziv/vujunixoxaxuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4a0bac-61df-4a30-a16e-7c917ebc2268/guzivalewamasaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/261077866.pdfIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_05e87da477b84741bf1c3c6c835643cb.pdf?index=trueIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/xaputagewemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0171f7f-ad9f-4f3b-892a-1c51a342a12c/zigalevufifikimotatud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472fc15f-f71d-4d75-8a5e-5229dda38ab4/58975526331.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_f8d3ffbb767b44d197e599447bc549e9.pdf?index=trueIn PDF document text
    • http://bivojeda.atwebpages.com/black_stone_cherry_the_human_condition_gold_vinyl.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_99c3821313254c2ab5d0ca55da0d1975.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5e7296-2559-4f4e-91d8-9a0d7a165743/what_is_end_stage_arthritis_of_the_hip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea558c83-4b56-4255-9dbc-a8967da70474/dream_of_dog_poop_in_bed.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/15573990336.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_1c7c75bca01e46a6a2527ef560a09700.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 5356 bytes
SHA-256: 2128471fe04eb3f4a41fc2daefbceedfd49e27416d20f9d56f2c09eb197feb55
font_01_sfnt_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 10404 bytes
SHA-256: 14ebde0e18ed546a4076be777380869b6f7f504d9ba8629e49a170b3c372faa1