Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cad38fc88f412cf…

MALICIOUS

PDF

72.5 KB Created: 2021-02-16 18:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 32b40bb526e07bf5eda770189a2449db SHA-1: 69bced0669a23e5e591a04726383b4a9232656e3 SHA-256: 4cad38fc88f412cf7c5f67a4496b03029ae03971dc191933f157d594a89758c0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=linear+programming+problems+worksheet In PDF document text
    • https://cdn.sqhk.co/tumitibira/2hbfWhf/4863456518.pdfIn PDF document text
    • https://xadamunakufadi.weebly.com/uploads/1/3/3/9/133986396/xoturikoni-zewiro.pdfIn PDF document text
    • http://tradebot.space/zuzegodavusemimonqavf.pdfIn PDF document text
    • http://jipegogujozu.22web.org/baby_driver_bellbottoms_song.pdfIn PDF document text
    • https://belawutuvuzepim.weebly.com/uploads/1/3/4/6/134605506/640019d749e8122.pdfIn PDF document text
    • http://garant-ritual.online/calculus_and_analytic_geometry_by_howard_antonpe94a.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/uIhjibP/voicemail_app_for_android_phone.pdfIn PDF document text
    • http://gromstroy.com/jelibokazerokezaxaxtsdr.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/tjhjiEg/zed_op_gg_jungle.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/b029a82.pdfIn PDF document text
    • http://sbrf.link/fender_mustang_1_v2_user_manualk8v4k.pdfIn PDF document text
    • http://jigatinapa.22web.org/politeness_principle_leech.pdfIn PDF document text
    • http://shishkin-seed.xyz/sentencing_guidelines_possession_class_a_drugslw5z6.pdfIn PDF document text
    • http://sellamorem.com/r._danny_boto25k4.pdfIn PDF document text
    • https://tasiwusod.weebly.com/uploads/1/3/5/3/135351817/wufivivogodolafak.pdfIn PDF document text
    • http://graatorama.fun/tetusewozafenerawojoziri6iwvg.pdfIn PDF document text
    • https://cdn.sqhk.co/guxifunuris/hhjEhkN/german_sword_makers_marks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gexegufikide.epizy.com/sofev.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/brother_in_arms_3_apk_mod_offline.pdfIn PDF document text
    • http://xaxefoz.epizy.com/accelerator_theory_of_investment.pdfIn PDF document text
    • http://fafaxuz.epizy.com/besixug.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_off0000dc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 5468 bytes
SHA-256: ddaf3d92afad56a9b46dfe2b145df8e920ff81f25bca708c3825f2fac5e6af8a
font_01_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 10984 bytes
SHA-256: aba2e3819cd62afb548b6168c04bcbd1920bb1352524bf7c3afdc8e32510cff7