Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85522425d21f0a4…

MALICIOUS

PDF

72.2 KB Created: 2021-03-11 04:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a472515461e4c0bb9156488273f2a9fd SHA-1: 7f052f6b4551bd2d5d6fe02ff8e4430b5f26d2cc SHA-256: b85522425d21f0a437fca2be6dd84eb00a5147d5d6d8b4f676236efa9ed49e57
186 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.
  • 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://gimoguvi.ru/wix?keyword=31+prayers+for+my+daughter+pdf PDF link annotation
    • https://bosowumajozidu.weebly.com/uploads/1/3/0/7/130740465/fd5fa99e.pdfIn PDF document text
    • http://hotita.space/chucky_doll_pics0hej2.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/gozal-niwajonawazir-kuliza.pdfIn PDF document text
    • https://fekodajitor.weebly.com/uploads/1/3/0/8/130874258/da9abdef3.pdfIn PDF document text
    • https://vijilipaguwojig.weebly.com/uploads/1/3/4/8/134872157/5072243.pdfIn PDF document text
    • http://solapp.xyz/34822131477dwvtl.pdfIn PDF document text
    • https://wujumumokujot.weebly.com/uploads/1/3/4/6/134613036/600e24b3.pdfIn PDF document text
    • https://xubusiruk.weebly.com/uploads/1/3/4/4/134481781/nerexi_xesawaxuvifofi_kufubivuniw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_37bd79a6e199481c987675a18ce4fde3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7255165a-13ff-4c63-a4b9-d1c1bba01b89/70741099894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ac3ebb-f7e7-4867-b516-fe49f65ae512/mirimilun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d162b832-5028-433e-b759-ddc6c0bb94ad/rufejomul.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/38756741802.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_ad42eb958d204fd0800bd8f7f619bdb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajezife/91960969932.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_d296cf5a71eb454cb071e835f2191db4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vazisi/poltica_del_siglo_xix_en_espaa.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/25249292856.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/windows_10_keyboard_shortcuts_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff5c6ff-886e-4eb0-9d15-4c750cfc9df3/harrisons_handbook_internal_medicine.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_67235d59be054f7eb47cf088c23de6cd.pdf?index=trueIn 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_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 5644 bytes
SHA-256: 46c329ac13d4dc4c6e039da68d70ff52258230fb98769c179e1f88e01925ddda
font_01_sfnt_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 9940 bytes
SHA-256: f00055e0a872f537dc63b7d846626c79c09288789b1cdee6fa125921c2c215d1

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