Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3802eef73eff2c5…

MALICIOUS

PDF

97.2 KB Created: 2021-01-19 15:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bbe4b7306f8935e312fb4b5eb472711f SHA-1: dc89cb611d944f9a46d264becc32c1b3798ad499 SHA-256: c3802eef73eff2c566634056b02eee6fae6c9c6808a7ea15fed4d02545abc4b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the presence of numerous external URLs indicates a potential for downloading further malicious content or redirecting users to phishing sites.

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
  • 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.
  • 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://bologen.ru/123?utm_term=jure+sanguinis+countries PDF link annotation
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/gibazokotuliwidujule.pdfIn PDF document text
    • https://zazejisodixad.weebly.com/uploads/1/3/4/3/134359446/fapekivutosu-rugoditevinin-dibupugupiluzag.pdfIn PDF document text
    • https://site-1166603.mozfiles.com/files/1166603/airtel_broadcaster_bouquet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454984/normal_5ffcb4cbc7b73.pdfIn PDF document text
    • https://site-1175420.mozfiles.com/files/1175420/holistic_health_and_online_nutrition_school.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5fff4bd2677b6.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/nunevawu-wavimokomudina-vuzawexe-jemidowigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_5fa8c35689d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fac52f2d3560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368750/normal_5fc47a983b447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5fc9220a03ff0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5ff4b2afd5312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447497/normal_5fcbf33e1ea7b.pdfIn PDF document text
    • https://dumaxenuwumav.weebly.com/uploads/1/3/3/9/133997891/02f7f56105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5f90826bb8fa5.pdfIn PDF document text
    • https://site-1171628.mozfiles.com/files/1171628/top_music_70_80_90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://walefusariwe.epizy.com/healthy_food_guide_chocolate_caramel_slice.pdfIn PDF document text
    • http://gelidug.epizy.com/kate_morton_the_clockmaker_s_daughter.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/9841239370.pdfIn PDF document text
    • http://pogifovemujure.epizy.com/fowiwudugapafupatisonet.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_off0001319d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319D 3080 bytes
SHA-256: 0e299f4eda0b40cdf2c244752c4529d005407175dd62f2eacf8fb406280a7b12
font_01_sfnt_off00013c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9F 4924 bytes
SHA-256: 3e1ce9b0192ff27aa32a3eace2b8b5e461273e7de6404772583f955344c6c5db
font_02_sfnt_off00014d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6E 12580 bytes
SHA-256: 616fcaafd8d374a4dc81b747aa5015f99b3baf5ac2e448c9c9b0fec5abd23025

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