Malicious PDF — malware analysis report

Static analysis result for SHA-256 6644304622dc60b0…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 09:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 744fbd46888a8a53e9cb8b504ed8d33f SHA-1: ac6a3d48ac48e010e897d97de3c81417659846f4 SHA-256: 6644304622dc60b00a3e0380ca1e17ea8de8deaf0b0b11af0de941e28c02aaf1
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=fat+diminisher+system+free+ebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463812/normal_6011513d293ee.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/uuxjiSz/42076272198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380237/normal_5fd0526a608ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427287/normal_600bf7018a2eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452154/normal_60045d2cb5a87.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/what_instrument_is_used_to_measure_temperature_of_the_atmosphere.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/haPyppm/candy_stripe_jumpsuit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fc5f99cdf6ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5fef1634ab557.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/12shaDn/25420599005.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/Ztia6ji/free_cell_phone_music_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/ggjxzid/14645213484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_602ea432e183a.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/zesixefe/fireworks_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/66030750755.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/acc_guidelines_stable_angina.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_off0000dee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE6 5376 bytes
SHA-256: 0e9d007df5720d30636e0f25b0ca5a795044d02ef7e2341c31809dd77110ca25
font_01_sfnt_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 10364 bytes
SHA-256: 9b0402946d5be3a0a880a35a0324608a426c47b77bd5cec9afad01c4f5a31868