Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae56c4f443182e2c…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 17:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bfa6b4d3a1d3247370fe5ae355adc07f SHA-1: 6c5e950e8be831d979edb2efc07e0ec492b6f23d SHA-256: ae56c4f443182e2ca5d575dba752fa37c4a0183b6042ae2f9af6d0fbdb94dc96
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://yafferge.ru/wb?keyword=how%20to%20tell%20the%20age%20of%20a%20nordyne%20heat%20pump In PDF document text
    • https://static.s123-cdn-static.com/uploads/4497346/normal_5fcc52975f33d.pdfIn PDF document text
    • http://waniwukudalutef.22web.org/wwe2k_android_games_mob._org.pdfIn PDF document text
    • http://eurosett.net/722469531794uoc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_603290a8be3e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447107/normal_5fe2b7984ebcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_600fd1f17ab31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_601b2a3f0531d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutagefev.epizy.com/jiwabukufanexodo.pdfIn PDF document text
    • http://difedomuki.epizy.com/79521910448.pdfIn PDF document text
    • http://memaded.epizy.com/what_is_the_relationship_between_equilibrium_gdp_and_full-employment_gdp.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/catalago_hinode_em.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/jisosibafivenok.pdfIn PDF document text
    • http://zifasodokid.epizy.com/latin_america_political_map_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/indian_and_world_geography_in_english.pdfIn PDF document text
    • http://bokonejedebi.rf.gd/85684136566.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_off0000db73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB73 5432 bytes
SHA-256: 6b1c04512a17a6703ff921c892ce8b2974df3ac0ef31d99d93cc1ec3653a002c
font_01_sfnt_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 10324 bytes
SHA-256: 910c059b694ddacbc31b309591f784221d450ce990823bcce28ff33b358398d1