Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f36d7993b768eb2…

MALICIOUS

PDF

71.0 KB Created: 2021-02-21 03:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: aa26b54d14ba9f166d9a93b4cdde3e9e SHA-1: 2e744467f2c6c940df3026c6c6b8e3466855dcdf SHA-256: 3f36d7993b768eb263a66c104ceb8bfa321e7acec8025cc09a6a51a8d4f60011
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://maypoin.ru/wb?keyword=tabla%20de%20densidad%20del%20alcohol%20etilico%20a%20diferentes%20temperaturas PDF link annotation
    • http://sellforce.ru/9109848865il8zs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_5fe708b4bb631.pdfIn PDF document text
    • https://xujufefar.weebly.com/uploads/1/3/1/4/131483110/4372956.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/gexuwezizo.pdfIn PDF document text
    • http://doordash.link/75122563411gm76h.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/a29218851.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/1599005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_5fda93c2f387f.pdfIn PDF document text
    • https://mutefalififide.weebly.com/uploads/1/3/1/3/131383766/fetefevesaduzeje.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/mapoxitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fefcd54a63da.pdfIn PDF document text
    • https://xekijepomi.weebly.com/uploads/1/3/4/5/134508866/655762.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/vulugabon.pdfIn PDF document text
    • http://creditreportusa.info/kokoro_natsume_soseki_amazonniey6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozixexegaliwe.rf.gd/omega_excalibur_remote_start_reviews.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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 5484 bytes
SHA-256: 243c886c31f22775b3823f114b1d766f17c034d122eef40e7f2711645b219836
font_01_sfnt_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 11716 bytes
SHA-256: 77635f9e9759bcb9133dca20e4120bb3bb1d031512684915d9f4079dbaf084f5