Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5756ba759e14f59…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 00:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 71a2e84626f348168a95f885bc09ea7b SHA-1: 70cfefbe665718062d04359b3362d5666331906d SHA-256: f5756ba759e14f591e734166c6b0862136b365992280e91c9f5e155a97a97fee
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/award?keyword=aa+4th+step+character+defects PDF link annotation
    • http://domainlimax.xyz/progress_report_commentsqyrh4.pdfIn PDF document text
    • http://zoneeuro.pro/what_does_pearl_mean_in_the_bibleooaln.pdfIn PDF document text
    • http://azorocheat1.xyz/3m_fire_barrier_sealant_spec_sheetsfxyc.pdfIn PDF document text
    • http://snapchat-alert.com/kofanuxipimerudij36tx8.pdfIn PDF document text
    • http://salet.store/conflict_resolution_strategies_meaningon3zp.pdfIn PDF document text
    • http://i-men.ru/26274243432c7e6u.pdfIn PDF document text
    • https://katodelof.weebly.com/uploads/1/3/6/0/136051175/00f278.pdfIn PDF document text
    • http://arendagg.xyz/40297393108o7kqo.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/F6xjfVC/dragon_quest_11_casino_tokens.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/pobageji.pdfIn PDF document text
    • http://ledy66.net/64626416376fsskk.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/regovadeje/vavegakizigusubirugozi.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/mumisejiluxowemefeb.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/mixez.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/12319259864.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/fatigue_test_report.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_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 5288 bytes
SHA-256: df38fd9d1c0073c05845f41550a33c4c1abc9070acec4cdf90ca2cf2dcbd99df
font_01_sfnt_off0000f4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E1 10176 bytes
SHA-256: 2f912abfaba69cba92f354fe7baf9c68b9a94e293f08dc66099bf75876f126c7