Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc28946ff908120…

MALICIOUS

PDF

47.8 KB Created: 2020-11-08 10:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 82cda7184686ab427e9f601a726116a8 SHA-1: c43a4a68ff67f9b3ec4824bbfdc3d74a716b28a9 SHA-256: 1bc28946ff90812042eb51ddd32b23f7ed4e4e25a712b61bfd3717e3facd725d
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=focus+on+grammar+5+pdf PDF link annotation
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/jugufuzeb-budaw-wezolozez.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/36c49.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.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/zupenafud/joxaziteriwunebuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/basic_rental_agreement_free_printable_form.pdfIn PDF document text
    • https://getalam.files.wordpress.com/2020/11/10142971842.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/tesebo.pdfIn PDF document text
    • https://xanaledevevi.files.wordpress.com/2020/11/22463684557.pdfIn PDF document text
    • https://bamadebib.files.wordpress.com/2020/11/73417890042.pdfIn PDF document text
    • https://zorafeli.files.wordpress.com/2020/11/54058806529.pdfIn PDF document text
    • https://woxelowobabi.files.wordpress.com/2020/11/rajilida.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 7548 bytes
SHA-256: 7b676b6fd26efe56e0aa0845424aa16d46f35905ef560084d2d4b15a931c1db6
font_01_sfnt_off0000774b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 5524 bytes
SHA-256: bdcab7add28c5989f81bc6cf476a4d95e43f503e47b061021396ddde513821bc
font_02_sfnt_off00008a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 11196 bytes
SHA-256: 9df067d5f23ea7583d825d6d22c5704d479333f08755be4034f5d1d24e4fa342