Malicious PDF — malware analysis report

Static analysis result for SHA-256 6552b5a94c596edb…

MALICIOUS

PDF

65.1 KB Created: 2021-02-05 18:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 34385705574d128cb380c00436b9519a SHA-1: bec1f462cca46bc1773f1c44e5c6ec1358e40bc1 SHA-256: 6552b5a94c596edbbb1bf8059c78d695644ceb22a959c6db18ce27143ce757c4
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=avery+tent+card+template+small In PDF document text
    • https://vizejuvevu.weebly.com/uploads/1/3/2/6/132681979/xekovoguwa.pdfIn PDF document text
    • http://bigtittybella.com/archicad_19_installation_guidebav5e.pdfIn PDF document text
    • https://zoxanomo.weebly.com/uploads/1/3/1/1/131163640/5eff66.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/6002455.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/b4453932194814.pdfIn PDF document text
    • https://fusewire.weebly.com/uploads/1/3/0/7/130776481/retopeto_misixefil.pdfIn PDF document text
    • http://specialsale.info/tiktok_songs_namesvpbg1.pdfIn PDF document text
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/7118070.pdfIn PDF document text
    • http://grizhoff.ru/gikiwodokanazukizisnh2q9.pdfIn PDF document text
    • http://copyrightnotices-form.com/best_country_ringtones_free_music_songskza45.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/etcgczn/najowimixetitiroduv.pdfIn PDF document text
    • http://fullpisetc.ru/just_dance_2019_bang_bang_bang_vipisdn9.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/98ab6.pdfIn PDF document text
    • http://gradstroy.su/ziwewuzop9sztf.pdfIn PDF document text
    • http://citimart.online/gegoxibajedimabsjkl8.pdfIn PDF document text
    • http://keepmaxi.space/advanced_ip_scanner_for_androidalcu7.pdfIn PDF document text
    • http://magic-spring.com/55585972687wjxwu.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/wexukufedepim/63215975204.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_off0000be0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0B 5372 bytes
SHA-256: 27dc1ad11abc20b5f158ed2800c12637053bf54b1798f279a95993507a3f8b52
font_01_sfnt_off0000d046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD046 12152 bytes
SHA-256: 0372c1bb7ddbf24407a138448194e28786d08c27aa6567626c961b8035860281