Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f4e1205f73a8f0…

MALICIOUS

PDF

77.4 KB Created: 2021-03-25 13:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3758dcd4a0288d5b3140daac538391a0 SHA-1: 463fd3ef3a64d95edb1d9069096dd48f1c54eeff SHA-256: 74f4e1205f73a8f0b491b20cea586e1daf0fce08a5259f3a87dda88f5be1905c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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.
  • 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=how+much+is+amazon+cloud+cam+subscription PDF link annotation
    • http://rijinalazutegav.22web.org/bhoot_fm_low_quality_2016.pdfIn PDF document text
    • http://zimejitudik.iblogger.org/7687506068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_60468d9a34c4f.pdfIn PDF document text
    • http://useplafond.xyz/casio_fx-115ms_s-v.p.a.m_manual1o3nc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_6054c81889879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463009/normal_5ff796e109517.pdfIn PDF document text
    • http://instapriz365.online/57713791497aw7cg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_60583fd9ee813.pdfIn PDF document text
    • http://egosikenclub.com/acca_p4_june_2012_question_paperdn12l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_60377fad00ed9.pdfIn PDF document text
    • http://impergamon.com/american_born_chinese_character_mapr48f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_601a016143328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471710/normal_5ffa1d2b9866b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_603025bf1f4cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaximibirada.epizy.com/49750333037.pdfIn PDF document text
    • http://zizutanerate.epizy.com/free_violin_sheet_music._org.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82cce48-1971-40be-ac32-26fe3495315c/somavitatobedunanidego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b04f19-2362-47d9-b1af-1c3a40a093c1/gopro_shoulder_strap_mount.pdfIn PDF document text
    • http://nirepuxakidogu.rf.gd/determinacion_de_coliformes_totales_en_alimentos_nmp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967df572-4170-4161-bfc4-c0fede064fd9/where_to_get_tested_for_covid_19_in_colorado_springs.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_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 5556 bytes
SHA-256: e4e8afbaaa4a92ea5a248e26c4b8bcf06f2438552bd4cea0d449515083a0042e
font_01_sfnt_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 11056 bytes
SHA-256: 54c9666d821d8dc39b7d94c5a08904448f404d30d139ae31d3f0249d55658c09

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