Malicious PDF — malware analysis report

Static analysis result for SHA-256 f602628f7e617fa1…

MALICIOUS

PDF

80.2 KB Created: 2021-04-29 05:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 64d541792b7d9c5b6bbf09b6df124ead SHA-1: 52bd521c353e65d30fe7efc845df88360be955e3 SHA-256: f602628f7e617fa1cc131c245749f71a667a463134f721377b24a747be474ab0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of commands that could be used to execute malicious code, likely via JavaScript within the PDF.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/strik?utm_term=our+savior+drivers+ed+spring+2021 PDF link annotation
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/df57b9820b43.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/iigheTU/31064565103.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/binomial_theorem_explained.pdfIn PDF document text
    • http://roxopazin.iblogger.org/zoxirugolazejopelazejub.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/fafibodazonoze-negakoxa.pdfIn PDF document text
    • https://koduvorubosu.weebly.com/uploads/1/3/4/7/134719400/tosotuw.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/cambridge_igcse_computer_science_workbook.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/windows_powershell_ise_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/6japrid/how_to_write_a_good_business_proposal_email.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/jgjUN76/turobaxi.pdfIn macro / runtime command snippet
    • http://begedotupatato.66ghz.com/63900526276.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/rojarasIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vejaxuka.epizy.com/agent_vinod_full_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/27680777291.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/bike_racing_games_for_nokia_e63.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/splashtop_2_remote_desktop_pc.pdfIn PDF document text
    • http://dafolilujoxupan.rf.gd/34390875969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394f7e65-0a43-4e50-afc2-2e09cc75f056/fuxegoxolasudetupode.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/formule_calcul_salaire_net_en_brut_quebec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e6ef71-89c2-4570-a172-c9ddd95df914/motorola_pr400_antenna.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/exercise_ball_size_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 5312 bytes
SHA-256: e33829a212d51ba3d2a273f83c1c2c69a29603fd2790eed14a1abea8a6cfd8e8
font_01_sfnt_off0000ff78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 11020 bytes
SHA-256: 238e9d876255abd55dbf875db3cb9580067af6670b2ad7d60e91c1c85a114228
font_02_sfnt_off000124ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124ED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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