Malicious PDF — malware analysis report

Static analysis result for SHA-256 3027dd14e921ee95…

MALICIOUS

PDF

224.9 KB Created: 2021-04-02 13:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1748b08b1673a340012bba84adf0d55d SHA-1: 560c31e00dbc3a68159eca3ae11d7b762753eb93 SHA-256: 3027dd14e921ee95c5737609b3505006a408925f11caac5fa4db643ece4776ea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The presence of an image lure linking to an SEO redirector suggests a phishing attempt to trick users into downloading further malicious content. The embedded URLs, such as https://xezojetit.ru/strik?utm_term=d%2526d+5e+summoner+class, are likely used to host or redirect to the secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://xezojetit.ru/strik?utm_term=d%2526d+5e+summoner+class PDF link annotation
    • http://natlegend.space/61460429406lf621.pdfIn PDF document text
    • http://zuraleres.mywebcommunity.org/dream_dictionary_christian.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_60391f386aaff.pdfIn PDF document text
    • http://123dutch.com/97529863162r2kga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467593/normal_5ff1f1cb8f766.pdfIn PDF document text
    • http://gidpopiteru.com/how_to_have_good_speaking_skillss61ny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fced980d035e.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/how_to_cure_brain_fog_anxiety.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/motomodumatujusunoxelafuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_602710e2300ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5ffe42b355790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_604fbec8cc5c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601b359f51eb6.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/35825417256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jadufabusen.epizy.com/52452610989.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/21338516122.pdfIn PDF document text
    • http://tekurowiki.rf.gd/xibufegogegutewutilezim.pdfIn PDF document text
    • http://muvipej.atwebpages.com/zugikezilurivodizi.pdfIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/roots_of_quadratic_equation_formula.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/angularjs_6_download.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 10020 bytes
SHA-256: 4c36e8681fc3df988665ff1a54f646c1c02a4a38baafbe4ad0301f1261d1f3d9
font_01_sfnt_off00012211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 166284 bytes
SHA-256: 3e992ed0f2f211de9d0393c81267b19460c8f2d29fccb0d681e1a9afecdd4fd0
font_02_sfnt_off00030a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A43 4156 bytes
SHA-256: 278cac2e78d1b4950b7c4295bc4000fde350c7c8fc6a349bfdf9917f5098d62c
font_03_sfnt_off00031872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31872 13468 bytes
SHA-256: c68df5616ebd661b6c638e98b0f902f784970225c0947074934b47fcc75909f2
font_04_sfnt_off000343fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x343FE 17344 bytes
SHA-256: 84b913cb644c6e1437bf18e91af1598acc5fd67e6252f76c2e75fb107dd842e1
font_05_sfnt_off00035d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35D08 16316 bytes
SHA-256: 46e71cd2f9f06a2ca42926595633c914419adedc2dcfec629a7c300747247191

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