Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81059e253bbda35…

MALICIOUS

PDF

72.8 KB Created: 2021-02-13 03:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8d6061060e54ccbbe7da73d7b4cfe22f SHA-1: dc92bcbc30524a70bd24dc86cfe37f1887024ef5 SHA-256: b81059e253bbda358e6c7daf3ae4cf4185d3a717887398d8e9665c69fc486e42
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=choice+of+games+apk+mod PDF link annotation
    • http://m-ryanaf.site/94257308496pm49t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5fee521eef2bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_6027210522912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_5fd5fcc564579.pdfIn PDF document text
    • http://copyrightsupport-ig.com/50170631136j8x8v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5fe979781a40d.pdfIn PDF document text
    • http://refajunabewatog.iblogger.org/fugifawuwunofede.pdfIn PDF document text
    • http://hydra.moscow/night_elie_wiesel_e_bookzo0rs.pdfIn PDF document text
    • http://godumos.22web.org/suzaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5fdece186b62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_5fd8400a5d077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutezirupatot.rf.gd/muvivegobamoxet.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/oxford_learner_english_dictionary.pdfIn PDF document text
    • http://dekibej.epizy.com/wekevofuzeko.pdfIn PDF document text
    • http://sodebaxekigefip.rf.gd/call_of_duty_4_mobile_game.pdfIn PDF document text
    • http://gonulurejojele.epizy.com/globe_and_mail_stock_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/farewell_to_arms_guide_gungeon.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/91232490507.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/android_device_manager_lock_screen.pdfIn PDF document text
    • http://zaninenuj.rf.gd/marvel_contest_of_champions_mastery_guide_2018.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_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 5408 bytes
SHA-256: d59d4a75de186f3b194a6ee3fb6f34c30d3877be7a456630f80bcef036976b63
font_01_sfnt_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 10472 bytes
SHA-256: cb1abe02d0f7c8a8944f807c558e489b03d9b92d54dfc1064dffcfe883e32d4f