Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a977a2aebc3db0…

MALICIOUS

PDF

71.6 KB Created: 2021-02-14 22:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dcddf3aa0e3cd44f8d071f60f6ef737b SHA-1: 341045b4500ef097562e6b2d1893b0ac67fb9721 SHA-256: 70a977a2aebc3db0c22f170eeb647289dc88c1c669c9831b42bce23c8800ee7b
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/aws?utm_term=chattel+mortgage+form+meaning In PDF document text
    • http://skidki-day.site/video_status_song_tamilrs4kk.pdfIn PDF document text
    • http://galoomer.online/541241557029xkk0.pdfIn PDF document text
    • http://alcozerox.com/hdfc_rtgs_form_editable4yu1x.pdfIn PDF document text
    • http://good-production20.site/java_inheritance_mcq_with_answers8v99u.pdfIn PDF document text
    • http://duplicwcnj.space/fejaxuvuzawzjv0c.pdfIn PDF document text
    • http://fortuneo.biz/pivimu923pu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470677/normal_6004186d667e8.pdfIn PDF document text
    • https://sokasabakowupop.weebly.com/uploads/1/3/4/0/134012989/jolafeviti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454182/normal_5ffdb27aa9498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/c_s_e_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/hospital_infection_control_guidelines_2018_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/nuribekekesukojomap.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/things_fall_apart_character_traits_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/bififi.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/doom_dota_2_guide.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_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 4908 bytes
SHA-256: 101390c79f966e2280cd09c0e5736129bd4aa016a7003285db292a15d3dba0f7
font_01_sfnt_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 11236 bytes
SHA-256: e09b21484f46bc97b99a2e93eb508ce2142951d6d9fc5f178ca03095844d5a53