Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cc718df5fcc31f…

MALICIOUS

PDF

76.1 KB Created: 2021-02-15 06:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6bc9b8bab5a23681e20f9810b2a8fbd3 SHA-1: 0749adf263d7b9059e0b34193b794cb6d83dc861 SHA-256: 83cc718df5fcc31ffcb34cd2612122f57b3d4f0267c85ec3f6ca3a9864b222b2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=maze+runner+setting+analysis PDF link annotation
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/4f768f7aa0a.pdfIn PDF document text
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/jafabi-xovijugewazufi.pdfIn PDF document text
    • http://limowoduramu.iblogger.org/zawutemugadebabajewovop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_60028b2724b44.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/jBgehhC/69382605485.pdfIn PDF document text
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/koziw.pdfIn PDF document text
    • https://fezipogapatud.weebly.com/uploads/1/3/4/8/134888370/timuvemuwipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaluboxif.epizy.com/wagawan.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/slope_intercept_form_math_antics.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/brutal_age_mod_apk_new_version.pdfIn PDF document text
    • http://kedogevakubonog.epizy.com/worksheets_esl_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/ruseruvopisof.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/articuno_shiny_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/93757497466.pdfIn PDF document text
    • http://xukajipovaru.epizy.com/furofuwozokulukopomofatez.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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 5008 bytes
SHA-256: e0fb5aaaecf7828a3309b47eade0c2311e1250f1252c8155af54016acf4df6f4
font_01_sfnt_off0000ff95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF95 10488 bytes
SHA-256: 53aacc383a592676c894b15fe66a7b34c5a382c9d3459099147162cdb20866a0