Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be4030c73a6129e…

MALICIOUS

PDF

62.0 KB Created: 2021-02-12 06:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: edd589851649a1863f1c9d9b688cf65a SHA-1: d5723060e7b6760bdb27b63a372d01d1476234c8 SHA-256: 4be4030c73a6129e447c8f612b3ddad036101b3da873e35e5166def4f162946c
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://maypoin.ru/wix?keyword=genetics+with+a+smile+answer+key+pdf PDF link annotation
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/c6de6906613bb.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/nurasedojedata_fuvimigaxidufu_kijibeliwopoko_fejub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_5fe875717702c.pdfIn PDF document text
    • https://gaduforijap.weebly.com/uploads/1/3/1/3/131381464/5044410.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/80db0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_60057436be635.pdfIn PDF document text
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/winal.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/0ce26da.pdfIn PDF document text
    • https://pabalosuto.weebly.com/uploads/1/3/0/8/130813917/foroj-jukokajoromawib-jisuratepuku.pdfIn PDF document text
    • https://tuberosaguxe.weebly.com/uploads/1/3/1/4/131437792/dapemowaroke.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/5740705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5ffaa71f85c9d.pdfIn PDF document text
    • https://mikuzowadakan.weebly.com/uploads/1/3/1/3/131383480/8bd77.pdfIn PDF document text
    • https://felabare.weebly.com/uploads/1/3/0/7/130776415/serafegafolu.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/xinigipis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50F 5684 bytes
SHA-256: ab4d45d5c8ad48d15745432dd7f9325539a247dfeb2cd70dd61cab555d383250
font_01_sfnt_off0000c855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC855 9692 bytes
SHA-256: 95ddd8291ecdc5f44ac322038847f1cf478f0724ce406a2ac7c8beb99f64dd5a

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