Malicious PDF — malware analysis report

Static analysis result for SHA-256 66aba1c0220045d0…

MALICIOUS

PDF

72.7 KB Created: 2021-02-20 09:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 285b4656c085469f47883868df49470d SHA-1: 48ef502e9ae1f3587650d739c819b566b4de06fd SHA-256: 66aba1c0220045d0a060de3061222d50ec7bfc3abd35bad8a0d06908cbcd2f46
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://jacksth.ru/wix?keyword=csi+algebra+2+%2526+pre-calc+matrices+answer+key PDF link annotation
    • https://banafovogakake.weebly.com/uploads/1/3/5/3/135326552/9507078.pdfIn PDF document text
    • http://wirajamosilun.22web.org/what_is_the_1_rock_song_of_all_time.pdfIn PDF document text
    • https://wipezupogev.weebly.com/uploads/1/3/4/3/134307181/lipum.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/frog_dissection_diagram_labeled_worksheet.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/e88a0.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/jaxotulumojoj_wisidigan.pdfIn PDF document text
    • http://kogefidol.iblogger.org/alistar_guide_probuilds.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/pudafuxinudewuv-xizefotifasadik-tudogizo.pdfIn PDF document text
    • http://healthytrands.com/darkness_rises_android_gameicppp.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/1a07ea9ed8b3.pdfIn PDF document text
    • https://lonufiwinejuf.weebly.com/uploads/1/3/0/7/130776555/1066642.pdfIn PDF document text
    • http://organic100.fun/25594757132b8mf1.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/puxakigojo-monatu-nesad.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/766810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/razozaxux.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/xufosinizogek.pdfIn PDF document text
    • http://kopivenegi.epizy.com/75268968199.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D4 4640 bytes
SHA-256: 35fcba41bf0e32e8006eb9d36f6518e89ded80a653a909cb16c4a8842d0726df
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 11140 bytes
SHA-256: 3cd0598868bdc543964a04a70ed35bbddc8442787e60248328987c626e2bfd41
font_02_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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