Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cc796a46a7752c…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 03:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7d56add2e37a89965525ddff4251867f SHA-1: 1be7f0fab07e137292486a146b20e3d4f90fb130 SHA-256: 56cc796a46a7752cc06cd2516377c9220c91af3a43b24c219bb716476de97342
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://druttle.ru/award?keyword=lenovo+t420+wifi+drivers+for+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387562/normal_603837b00824c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5fe1c9d5d5457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_6011ed2a8e8d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5fdc89206bcd4.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/alkanes_questions.pdfIn PDF document text
    • https://wakutoji.weebly.com/uploads/1/3/4/3/134314583/togat.pdfIn PDF document text
    • http://wumupowon.22web.org/2869157651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5fffb9cd0a3d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5ff0e664b34e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383698/normal_5fccf5e57dc0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5fdd8404a36bf.pdfIn PDF document text
    • http://pizabalex.22web.org/bukekegabadojekukasas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447089/normal_5fdcbad4682eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepadegan.epizy.com/97805876659.pdfIn PDF document text
    • http://dixadenidufudu.epizy.com/nutritional_information_1_cup_coconut_water.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/magejasubediw.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/kaththi_theme_piano_notes.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_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 5168 bytes
SHA-256: 4044b93a56d2a2f34dcfe9f0e9ac95933350704dbdaf3c10899ce48f8371e490
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 13424 bytes
SHA-256: d12b957b70b4ea5f2b99cfcf0449f863486b6d4d772fe210ae18a3feab12e479