Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5e2f8e710b555a…

MALICIOUS

PDF

81.6 KB Created: 2021-04-11 21:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e52a8b2448595a65bc7d2807aefaa6c SHA-1: f5284cb89c24addc81e1345b469ee63e68fa514c SHA-256: 0c5e2f8e710b555a9cd37a1a99f44a5567822c4ce8497738e7ee0ef5400bd744
186 Risk Score

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 0.9990

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://baarspo.ru/strik?utm_term=how+to+take+apart+pdp+xbox+one+controller PDF link annotation
    • https://cdn.sqhk.co/woxiwokujuwe/if4wSid/read-_along_books_with_cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_603bfee8119a3.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/jgDgeJr/cbse_class_9_science_chapter_1_ncert_solutions.pdfIn PDF document text
    • https://misadedami.weebly.com/uploads/1/3/3/9/133997414/6978921.pdfIn PDF document text
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/8680396.pdfIn PDF document text
    • https://xutogimumunode.weebly.com/uploads/1/3/4/3/134375265/lexamamimofejalo.pdfIn PDF document text
    • http://busibear.com/88049804677h9qob.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/ON8gija/suwakejupupid.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/28912002367.pdfIn PDF document text
    • http://usmileofficial.site/content_quotation_sample_templateaz4d7.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/funcion_de_la_hormona_aldosterona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_5fd66f449d6f9.pdfIn PDF document text
    • https://donaleta.weebly.com/uploads/1/3/4/4/134481941/cea3b9b.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jrDjaDp/seguidores_likes_para_tiktok_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/eifjezZ/fexovawavotivedepo.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/hijidjX/list_of_naija_gospel_songs_2020.pdfIn PDF document text
    • http://timecodes.net/65474231832t31px.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_60468bc47599b.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/jowotikip.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/N1djehe/can_t_see_my_movies_on_apple_tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_603f06d6e36ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5ff92aab84abb.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/rajaperofi.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
    • http://vexolofifete.atwebpages.com/polynomial_and_rational_functions_worksheet.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_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 4952 bytes
SHA-256: 80663800b28585a84f22a710ea1d9cc4b23094ac755d40c36c02ee762144ac85
font_01_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 11156 bytes
SHA-256: c043a6bfcbf332246e593f716cfd2bd14401d7243830af6822a1fba681efb39c
font_02_sfnt_off00012a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A60 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f