Malicious PDF — malware analysis report

Static analysis result for SHA-256 129b9f04429bdc89…

MALICIOUS

PDF

73.5 KB Created: 2021-03-14 06:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 045a184124562456f02f56a7adb8aaef SHA-1: 2189b15c4356959e88ddf7ac8d19b274834bc7d1 SHA-256: 129b9f04429bdc89b4bad5aa3616b524e8b6a3e2b9c247fcc04343a97383c34b
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/award?keyword=nonequilibrium+hypersonic+aerothermodynamics+chul+park+pdf PDF link annotation
    • https://cdn.sqhk.co/wukiratuxazo/jifhegf/nutemenadinafewubugadarod.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/reading_log_template_for_elementary_school.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/chamberlain_garage_door_opener_not_opening_all_the_way.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/fluval_206_filter_media_setup.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/luxixixejalif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601241de57a5a.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/pamumomekesinijor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490244/normal_6023ce4301fff.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/VkhfYhc/barrett-_jackson_2020_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/geOPPjg/20481138464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_5fd99b0f4b32a.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/long_term_survival_food_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393036/normal_5ff28cadc6fcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5ffd472410fe9.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/7414862.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fc7b58f24983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465914/normal_5fdfac20e95e1.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/3hcBmjf/towuzeso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/apostolado_mariano.pdfIn PDF document text
    • http://lexireto.epizy.com/62662462221.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 5796 bytes
SHA-256: 778555a57c78ce97b46c8e189821940bbcce6dfa51b557a08c3718919e5c5273
font_01_sfnt_off0000f3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 10548 bytes
SHA-256: bf21f45fe3c7940f143327009d23b1be0525a72231b50aad07b79d226c015bef

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