Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a6c464590f5b5a…

MALICIOUS

PDF

71.4 KB Created: 2021-02-15 05:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cbb083a0e833e673b4fd40b997317b23 SHA-1: b4468631e6a7b6b33bef088d5b438318efcaca6a SHA-256: 39a6c464590f5b5a0b6d73952364625a72675a38845b42ad77f100771474f84c
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jottigo.ru/123?utm_term=wooden+music+stand+plans PDF link annotation
    • https://cdn.sqhk.co/xemugugafot/FJjbptR/game_of_thrones_brandon_stark_king.pdfIn PDF document text
    • https://lekamenofujilap.weebly.com/uploads/1/3/4/6/134690267/petagubivopakibi.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/43fe6a0bfff3b2.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/hhxhi5k/ledorulop.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/hgieRyt/trivia_crack_2_power_ups.pdfIn PDF document text
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/bebcdb1e21.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/gjagjjc/bakatufowi.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/cZIjaV3/among_us_memes_clean_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/vojeruzujuzi/bvMji1s/retro_arcade_places_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/ghiyd9T/45392058609.pdfIn PDF document text
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/sizakomasa.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/tOtic0e/puzamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavunununege.epizy.com/xewatotenatu.pdfIn PDF document text
    • http://jigiwema.epizy.com/ladeludojopulokafalol.pdfIn PDF document text
    • http://zofududa.rf.gd/extracurricular_activities_grifter_guide.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_off0000ddb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 5136 bytes
SHA-256: bfdaee691cb4ff1a804e9d5ba057c9ad553b514b49a1683fa7e6a6122c43f88a
font_01_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 9928 bytes
SHA-256: b748ea8b39ef78e632aab3d7d1e67f7a5044282d8164bfac6734e8375da0de2d

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