Malicious PDF — malware analysis report

Static analysis result for SHA-256 85df230717e67361…

MALICIOUS

PDF

78.8 KB Created: 2021-02-25 23:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9e62dbd82737bee577fe0a0e6c37b97c SHA-1: 53c34fd0256c559179222639648ad1d6decb3e9a SHA-256: 85df230717e673611a4251b01318b4046fa170e702e03cc1a3a8ba74c66ed43c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=bless+me+ultima+summary+chapter+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495065/normal_6025aba937888.pdfIn PDF document text
    • http://naturfresh.fun/lame_deer_seeker_of_visions_quotesxj9y5.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/KgjOihw/heroes_war_counterattack_english_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fcc8a8c60a6d.pdfIn PDF document text
    • http://dosemamorozaj.22web.org/writing_contests_no_entry_fee_2021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_601a3da1adf6c.pdfIn PDF document text
    • https://famepakemujo.weebly.com/uploads/1/3/2/7/132740594/bawobipusitusus.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/daighjy/supejejijasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_5fd1e99dca7db.pdfIn PDF document text
    • http://poradoit1.site/xanapagujuzipadekaxuw65y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5fdf7f552a497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470833/normal_5fce2ac9a9aa3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450517/normal_5fcbdffd8c03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_602a6f77bbc98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotasogova.rf.gd/mekubazetinujevexuto.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_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 5456 bytes
SHA-256: eef70dc1511e4525f2f105db39a909ddc8369badeb5e98bdf9dd0815700df8e4
font_01_sfnt_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 10276 bytes
SHA-256: 3a4c666a042a62f39f97acffafa01d95e589d4d5e1b59eb51283725963a19e5f