Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa67abd8cbdca310…

MALICIOUS

PDF

72.2 KB Created: 2021-02-01 22:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9617215a3620b4d4d5db41773fb9dfeb SHA-1: 05a35d5afdf2a14b0c527d21262b2ae3b49ee740 SHA-256: fa67abd8cbdca310cda1c6cfd8ac98d9a8a9ac5084f7366f408c211fc9b772f1
134 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains embedded URLs that point to potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/123?utm_term=cat+dissection+lab+answers PDF link annotation
    • http://guitar.su/impulse_response_in_simulinkzp2u5.pdfIn PDF document text
    • http://testrun.ru/my_little_pony_tails_of_equestria_pta0bj.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/3540025302ekiuh.pdfIn PDF document text
    • http://voicebftyi.com/receiving_end_of_it_all_lyricsqal2n.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/7325293023731sfd.pdfIn PDF document text
    • http://nikaold.site/suxegukcnv5.pdfIn PDF document text
    • http://kixetojonomezad.22web.org/34651851837.pdfIn PDF document text
    • http://hurleyshamburgers.com/fm_radio_app_download_for_androidt2quo.pdfIn PDF document text
    • http://fekedusotuxena.iblogger.org/zuxurebuvukakiranab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibesajaku.epizy.com/gastric_bypass_pre_op_diet.pdfIn PDF document text
    • http://zajunevoza.epizy.com/7284627469.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/camtasia_studio_for_pc_64_bit.pdfIn PDF document text
    • http://mujubelajuzuj.rf.gd/equations_worksheets_8th_grade.pdfIn PDF document text
    • http://waxukoke.epizy.com/36099064759.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_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 5068 bytes
SHA-256: 2ea094d285c1244999abe120a8e4b2ca50afd47659e28000a1c948f1dedbc58c
font_01_sfnt_off0000ed81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 11224 bytes
SHA-256: f47dc7fb495f131ffa8a347396adb07ce2a6fe3fadd189231868eff5d398daa2

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