Malicious PDF — malware analysis report

Static analysis result for SHA-256 655207ab0854903b…

MALICIOUS

PDF

71.6 KB Created: 2021-02-26 05:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 940a24f65cb6f41b4b6c322dbcb4f347 SHA-1: e7bc11180666d3c172af9540561d4b37463b69c1 SHA-256: 655207ab0854903bcb94302051c0f02cac44361ed26dbfeebba87e452135e68a
196 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
  • 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://leonvi.ru/award?keyword=hobart+handler+140+for+sale+craigslist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403556/normal_60146ee295736.pdfIn PDF document text
    • https://mokabeninenaji.weebly.com/uploads/1/3/4/0/134013120/jalogogulokuv.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/gorasaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5fecc52332144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5ff777d598455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404500/normal_5ff0cc5c969c7.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/jcN6l9O/tip_top_roofing_construction_inc.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/5978702.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/H90gjja/hearthstone_meta_decks_august_2020.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/xizakonebifif-zotujasafuvaw-dibezuna-mosise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_603113909de8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_5fe6ec225a8e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5fcc9b8a6a00d.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/zategafozasiru/estimating_decimal_addition_and_subtraction_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/harlow_solid_let_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/36974187658.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/47493291119.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/pakewalamisawov.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_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 5664 bytes
SHA-256: 0ed464559548bf63498da506daf0adb9e295ab77363d124b0a9fa789d79ed006
font_01_sfnt_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 10124 bytes
SHA-256: 6e225c5398e6ac55858600d6ecc2628d3a619d3f0f484093a4c3ab3a873a5f58

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