Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba64cd82ff1d6de7…

MALICIOUS

PDF

70.9 KB Created: 2021-02-28 13:15:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d7e1834333e1d133963a2aad4b892a33 SHA-1: 0c55bb58f51ad0c73f4becb02d5bad3377397172 SHA-256: ba64cd82ff1d6de7a1976c06cc0be9414c32eb237fde9db076dc87e2f0c5b3de
186 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.
  • 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://jumiwimov.ru/award?keyword=medicinal+chemistry+research+articles+pdf PDF link annotation
    • https://cdn.sqhk.co/pugirunosamo/ihjjbhf/43671776575.pdfIn PDF document text
    • https://limifotediko.weebly.com/uploads/1/3/5/3/135325738/bunotaxunipinan-pezero.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/jaDitTS/63182885901.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/6929737.pdfIn PDF document text
    • https://fixumimudojuzu.weebly.com/uploads/1/3/4/6/134607797/4298518.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/FhaJif8/62172237499.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunusol/jhf9yij/grow_credit_union_contact_details.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/V3iwigs/hearthstone_patch_18._4_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/hjhg5ge/download_minecraft_exploration_lite_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/7jhjcyP/stack_colors_3d_tower_runner.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/0131e6413d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_603b176d8fc68.pdfIn PDF document text
    • https://rodovijakul.weebly.com/uploads/1/3/2/7/132741348/b2654a25c68b.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/6031008.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/jpjjMVO/piggy_book_2_chapter_4_hints.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_5fe775c46c658.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/zidwESS/34321937402.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/14680106711.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/how_to_produce_canola_oil.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_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 5500 bytes
SHA-256: 52bf8b40f0d651bd36fc13c4ed93ce6dda427c0214c796da18e4c6e5d86d964c
font_01_sfnt_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 10004 bytes
SHA-256: e52b36e438bdcdbe604d92d90b66f13d11e040c1812b89178ff8087785cfa124

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