Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75a8405dab376d6…

MALICIOUS

PDF

63.8 KB Created: 2020-11-16 13:07:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5547eb429e164cac63c87e748c563c9e SHA-1: 85d6263209d8d4c2703f239e861b32239fd3095a SHA-256: d75a8405dab376d62f63991a2e3b4e728a0eb89b90b4f66f3ee27d41dcb68a8f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=simplifying+complex+numbers+worksheet+answers+kuta+software PDF link annotation
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/jorituvugofoxomonus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f9d27b921662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5f98cdc7788b6.pdfIn PDF document text
    • https://difomojixi.weebly.com/uploads/1/3/4/3/134319012/redurusob.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/juliziwojatige/booking_revolution_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4385cc76-c56c-4f39-81ab-fa73945d5fec/ys_91_sr_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/87091271428.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/how_to_be_a_3_man_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/drastic_ds_emulator_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/tawimebuwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb518ab-0d28-40be-a033-fc62c42cfe5d/the_resistance_of_a_filament_that_carries_2_a_when_a_10-v_potential_difference_across_it_is.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/justinguitar_acoustic_songbook.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/stacked_data_vs_unstacked_data.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_off0000bd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD54 5996 bytes
SHA-256: 48f11b7a5153adea09a0960aa8aefd6b50f2a4ac39b92306a81d4397afbcecdd
font_01_sfnt_off0000d1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B5 9556 bytes
SHA-256: 17621ac44dfd05f059a3ddbf86234bff236572940fc9aeac35c3e386f7ae7cbe