Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b9c5e3af18ffe9…

MALICIOUS

PDF

73.1 KB Created: 2021-01-12 17:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 76ed4e6bb81f57c542b439327a76949b SHA-1: ee809295ae60955a50ad2eca22a62fedc50a9c43 SHA-256: f1b9c5e3af18ffe96ea09958411b5b958f976803345efd621b1820812eb4e1d0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although the document body is heavily obfuscated, the presence of a malicious URL suggests the intent is to redirect the user to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/123?utm_term=base+building+games+android In PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/pitepujegofoli_nawune.pdfIn PDF document text
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/pumitowavuzo-tawokoredaluje.pdfIn PDF document text
    • https://zaximasuxudaris.weebly.com/uploads/1/3/4/5/134590642/tebode.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/jokerekokeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5fd8cc3b1b325.pdfIn PDF document text
    • https://site-1198856.mozfiles.com/files/1198856/gibukelotajuretare.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/6950532.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/nanajuzejurevibi.pdfIn PDF document text
    • https://site-1176821.mozfiles.com/files/1176821/menuvezunamubob.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/jifesu/xapafifesememuteleg.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/45432525388.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/arsenic_pollution_in_drinking_water_in_west_bengal.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/algebraic_formula_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/hungry_shark_evolution_hack_apk_rexdl.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/bruno_mars_grenade_fakaza.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/destiny_2_last_wish_raid_vault_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_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 5336 bytes
SHA-256: a8c8865b6dae7a06b837482de6265add8973bcb7d3f66f57bafa8210dd983eda
font_01_sfnt_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 10180 bytes
SHA-256: a3547694ac8429a90765aeee6f6ac46fd6fdf56f147ee4c5b39d73473c747f63

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