Malicious PDF — malware analysis report

Static analysis result for SHA-256 83aef49d6ca59f36…

MALICIOUS

PDF

73.9 KB Created: 2021-02-26 15:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ebc8bcd64b75badce5f549e928dfdb9d SHA-1: 726d4a76628118c33537e5a473c58f096967e1e2 SHA-256: 83aef49d6ca59f36d0a1e8ffd45b0c121465e66c22cf3a097c69d7721dbc6d22
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://leonvi.ru/award?keyword=how+to+make+someone+fall+in+love+with+you+manifest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365546/normal_60192380b9f48.pdfIn PDF document text
    • https://cdn.sqhk.co/wenoxavawo/7RLhjP3/puzzle_dragons_x_characters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_6005736faeea1.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/igiidhj/18847081320.pdfIn PDF document text
    • https://jobeluraxofedir.weebly.com/uploads/1/3/4/3/134317239/6335665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fdf32583120a.pdfIn PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/ca88e8d3cbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_600335b41e490.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/OifLB9M/bubble_tanks_2_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_603140b8bd69f.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/djalaji/smashy_road_arena_hack_download.pdfIn PDF document text
    • https://ronukeva.weebly.com/uploads/1/3/5/3/135385202/dumovifise_xonigil_zotinet_japisenozekomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fd15365004b5.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/vixuwogetiv/80572319543.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/liver_transplantation_guidelines.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_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 5192 bytes
SHA-256: cb661393825e6f198946319679d27d0172d9731011625aa2d011642eb1badc35
font_01_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 10184 bytes
SHA-256: f13a200db5ee788035f0954868c42b0b3bb0e11f63fb221be40f5a4a56af9940