Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4270693da487ef…

MALICIOUS

PDF

68.3 KB Created: 2021-02-16 01:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0cf62eb85dc477686e4c10bcc93b1a6f SHA-1: aa4f8bbcc36e2266eff85952c50a6e40617bc170 SHA-256: 4a4270693da487ef223bf3fd837505ce4988b09a8b87fa9e2be8ce0e890379e2
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://jacksth.ru/wb?keyword=amplificador%20de%20potencia%20transistores PDF link annotation
    • http://bogaxusamukuxid.22web.org/aov_richter_guide.pdfIn PDF document text
    • https://rarifipive.weebly.com/uploads/1/3/4/1/134131304/vamukejuwufo.pdfIn PDF document text
    • http://fewizoge.22web.org/participles_and_gerunds_exercises_with_answers.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/5448881.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/2485642.pdfIn PDF document text
    • https://dipidedi.weebly.com/uploads/1/3/2/8/132815933/3470790.pdfIn PDF document text
    • http://lenudes.com/pacific_fire_vine_maplewnjip.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/7115767.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/24ea780ce.pdfIn PDF document text
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/gimevamoxakiwudavufo.pdfIn PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/6157209.pdfIn PDF document text
    • https://matiposokatogu.weebly.com/uploads/1/3/0/7/130739068/lowebuluja_befubeso_zujapomisika.pdfIn PDF document text
    • http://trujillostacoshop.com/nepedepamurijemarikijxq2kx.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/sukewilube_vavilim_rusuwusawefazop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujemewemavud.rf.gd/ricetta_dei_canederli_al_formaggio.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_off0000cf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 5288 bytes
SHA-256: f7245f4871f942098f93c6508c7c1397554c715969ec322f677bef2561008282
font_01_sfnt_off0000e173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 10268 bytes
SHA-256: ef933ff61f9664e491cad11aa0cc5e538c45d5b8d5653c8ae5ac45ebeb9c4156