Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c38a4958982e12d…

MALICIOUS

PDF

68.8 KB Created: 2021-03-14 19:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e6c6832cf9f5ac18cd9883bd341d07a8 SHA-1: cd7ec7fdc4862d20f759c7e60b8ee11138071d85 SHA-256: 0c38a4958982e12d0c73af0548731be83244b4e5bbf3a337c58a7afc9404b2c0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://botokaw.ru/strik?utm_term=black+hawk+down+soundtrack+cd PDF link annotation
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/lotija-buxabizaxixolo-gabukukew-zasuw.pdfIn PDF document text
    • https://kabigupux.weebly.com/uploads/1/3/4/4/134442156/mojepibi.pdfIn PDF document text
    • http://womakojufute.22web.org/advanced_capital_structure_theories.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/wizavolapawo.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/b35d36afd46.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/703894cafe2.pdfIn PDF document text
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/d3bb9fbaf4ed8.pdfIn PDF document text
    • https://kakoxisowi.weebly.com/uploads/1/3/4/3/134358665/zenujexoze_ziduvegusakivo_faxulunazes_balibe.pdfIn PDF document text
    • http://smallita.space/garfield_kart_apk_v1._02_full53u67.pdfIn PDF document text
    • http://gopururin.iblogger.org/moxanukekugara.pdfIn PDF document text
    • http://gebatuvarak.66ghz.com/what_are_u_up_to_answer.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/1219626.pdfIn PDF document text
    • http://bahis-sikayet.com/55589599152bjwcg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xebikegami.epizy.com/free_template_brochure_cdr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d05422-ae64-4300-956b-fa5b1e0d32f1/belazipewarifikusesuvafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8ed61d-59f7-4efa-a374-b752278964f5/r7_250_techpowerup_review.pdfIn PDF document text
    • http://zenejoku.rf.gd/dokitepavexekiravizeruka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf29b70c-22fa-494d-8c9e-d89e045b1a13/persuasive_essay_samples_8th_grade.pdfIn PDF document text
    • http://tinutun.epizy.com/teacher_attendance_register_format.pdfIn PDF document text
    • http://wixufoliwesomep.epizy.com/23500825402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d791f63-bb9f-4055-bed2-2197b54f0182/2005_honda_accord_v6_maintenance_schedule.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_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 5232 bytes
SHA-256: 2f9cce6ae284221d6d31beb8b79262f3b8723fb32f2c74b5cf74cb1690a5e349
font_01_sfnt_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 10760 bytes
SHA-256: 14a70efe3ed14d7eb9fea34adbc4dcccbdd86c80497a3b42608bcec7b38a7084

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