Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5a526760d0aeb2…

MALICIOUS

PDF

90.1 KB Created: 2021-03-18 08:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 822d43bbac802d70a1b3e3ed7a4b9523 SHA-1: 22c227e210ce320239bd50ab385fc310d0866083 SHA-256: 5e5a526760d0aeb24527d24caa8816863ffe87fec84537b5fc07a8b9720b8ac0
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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://golowaki.ru/strik?utm_term=races+of+guild+wars+2 PDF link annotation
    • http://dobafeser.66ghz.com/battlefield_4_reloaded_update_xbox_one.pdfIn PDF document text
    • http://gunotuje.iblogger.org/44814942352.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/duvatorokiti.pdfIn PDF document text
    • http://bukejasinopa.22web.org/evenflo_triumph_lx_car_seat.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/rezov-bitote.pdfIn PDF document text
    • https://nikojaba.weebly.com/uploads/1/3/4/6/134683319/suvugipunizowel.pdfIn PDF document text
    • 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
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_6d8409e65c1b46b09b9c9a5ab3600680.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/muzut.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/26067976526.pdfIn PDF document text
    • http://maguliveguj.epizy.com/what_is_cherokee_indian_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/mafetogavewisas.pdfIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_a906257e04364347830d186cd40c484f.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_52df9e13e2404b2c8d3e914341f02f5c.pdf?index=trueIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_a6c1e76245034d7aa0f7e8a460c15f52.pdf?index=trueIn PDF document text
    • http://sirowozikuko.epizy.com/xujizasowomuk.pdfIn PDF document text
    • http://futivel.epizy.com/chapter_20_medical_microbiology_quizlet.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_49a8e79fc53e47348cf76033ffa6c992.pdf?index=trueIn PDF document text
    • http://riruzozijin.rf.gd/japugijelaxevugibubapulem.pdfIn PDF document text
    • http://wemazepiba.epizy.com/hp_laserjet_pro_400_m401d_driver_for_windows_8_64_bit.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_b146cca4b4484d52bae5a98b852cc50a.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_6d74f6b9d4294f7db859cf478cb63351.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 2872 bytes
SHA-256: 8c1e587c0ac5688fed4c54f0ebe7b542bae707e62350aefe1cecce900efd9c97
font_01_sfnt_off000113f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F9 5116 bytes
SHA-256: 253e14ee86ff1d763419c5c3429d578d61e13513795e2a322b6c492908268a2a
font_02_sfnt_off0001257c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257C 11312 bytes
SHA-256: 1e5f3512df9a44a11ef545492e2e3f692f3a0fb62140def19b69cbb35e65755f
font_03_sfnt_off00014c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C5D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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