Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b97b295f0c878e…

MALICIOUS

PDF

72.4 KB Created: 2021-02-11 19:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 2c2bcdf573629f6f57b3a14b3dc24957 SHA-1: ecd32eb0590d8c88e999ea1026a277a675e7dde3 SHA-256: b9b97b295f0c878ee95aae84ad0039ed24e8d4b01ae04a07b07d8af9946659a1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=jpms+brokerage+manual+db-bkrg In PDF document text
    • http://bofesota.66ghz.com/33398485152.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/xagugod-golewalimodo.pdfIn PDF document text
    • http://wusuraxirobi.iblogger.org/free_guided_sleep_meditation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_5fe7d3e9cc47c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421783/normal_5ff14eeba335e.pdfIn PDF document text
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/gepak.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/ZhgMbJ2/titan_quest_secret_quests.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/2417571.pdfIn PDF document text
    • https://jojapewabivato.weebly.com/uploads/1/3/1/3/131379205/madusojot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403541/normal_5fffbdba36997.pdfIn PDF document text
    • http://wurogutevifo.iblogger.org/new_ps2_emulator_for_android_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipumekamerara.rf.gd/bigotiviwada.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/14370854542.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/45047489936.pdfIn PDF document text
    • http://vatamutotomo.epizy.com/inferno_1980_movie.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_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 5504 bytes
SHA-256: 74321ac24cc29af08d822fa5fd77e29548a95c9e01467e60b29ecca975a95757
font_01_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 10956 bytes
SHA-256: 5d93c9762f5c04c6a8ff5274966cc9f47d403cbd5d3b611be5e7251ca3d65e7a