Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f286632ed0c385…

MALICIOUS

PDF

71.0 KB Created: 2021-02-16 13:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 80c9865e2a91d4da3dea0fa2b6a8e715 SHA-1: bb788208842dbcfa81cfd08e2256c9d6d4f73b62 SHA-256: 88f286632ed0c385e12e6bad9af1a8c00b158a07060c7d3f6f9961ccefedf4b1
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://baarspo.ru/wix?keyword=mundo+apk+mod PDF link annotation
    • https://gunubamevozapub.weebly.com/uploads/1/3/3/9/133997290/tizazilexim_nejimefoketuge_jikis_jixekuku.pdfIn PDF document text
    • http://bifovasux.22web.org/49107077373.pdfIn PDF document text
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/zinuvutixefitavagi.pdfIn PDF document text
    • https://ziwobusomuka.weebly.com/uploads/1/3/1/6/131607005/48b1614.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/5093853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457311/normal_5fef4da1774c6.pdfIn PDF document text
    • http://ronojalad.22web.org/tomabakuj.pdfIn PDF document text
    • http://sokujojetutita.iblogger.org/11238982593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedelobezab.rf.gd/povegama.pdfIn PDF document text
    • http://tadiwolavis.epizy.com/setipoliwebugenaka.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/xizidizirafeba.pdfIn PDF document text
    • http://tunawibiga.rf.gd/xovisodezuwelufebixafuve.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/59698148655.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/vosigazerexewovojanetat.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/best_manual_carpet_sweeper_for_dog_hair.pdfIn PDF document text
    • http://jokilezitewoj.epizy.com/fajogowom.pdfIn PDF document text
    • http://pususarejopo.epizy.com/motajupa.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/lukomubujexotewim.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_off0000da0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 4868 bytes
SHA-256: f581fc78c75853aea7c2176b7800bc72e67286c36f15e991f331695583b95793
font_01_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 10872 bytes
SHA-256: 96d08f86ead9964465cfcad7679a7e61ccfd32655b4740599097753214742198

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