Malicious PDF — malware analysis report

Static analysis result for SHA-256 1108ac1b049f9d9a…

MALICIOUS

PDF

87.6 KB Created: 2021-03-19 21:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10cb30138a9c1a4f5f73af374d4550d1 SHA-1: 29617e8bac44a49ca9cb9a5555d9af88f40612dc SHA-256: 1108ac1b049f9d9a7274cfa34bfd137f58c18f2b2e170a6a3fada09bb45568c4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://ponafet.ru/wix?keyword=catme+peer+evaluation+answers', which is likely the phishing lure. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the presence of the malicious URL and the detection signatures strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=catme+peer+evaluation+answers
    • http://dikoxikikalonib.scienceontheweb.net/vacina_antirrbica_2020.pdf
    • http://galabogenezoso.getenjoyment.net/68339691207.pdf
    • http://xudozuborupi.22web.org/wix_embedded_mysql.pdf
    • https://cdn.sqhk.co/terasovo/jbFxgga/41198599844.pdf
    • https://static.s123-cdn-static.com/uploads/4413702/normal_5ffac2529a71d.pdf
    • https://cdn.sqhk.co/vuzefegevo/iage9VM/romegapu.pdf
    • https://cdn.sqhk.co/ropimipaf/epgiPgj/lighthouse_point_park_florida.pdf
    • https://static.s123-cdn-static.com/uploads/4501989/normal_5ff14e6bda11f.pdf
    • https://cdn.sqhk.co/tijinujul/dghKOgW/salobovuriforoxizib.pdf
    • https://static.s123-cdn-static.com/uploads/4460449/normal_5fca9433ef997.pdf
    • https://cdn.sqhk.co/bozadukopufu/YihqjiJ/dream_daddy_craig_minigame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_e9c082120a07447f80583fd7e9c20dc2.pdf?index=true
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_489d0cabc0164c49af2f6736105d4e9d.pdf?index=true
    • https://s3.amazonaws.com/tokatefozude/monat_compensation_plan_explained.pdf
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_83fb309a78264a538f4e3e4f29536fb0.pdf?index=true
    • http://mubodadekutaxim.atwebpages.com/13737233805.pdf
    • https://s3.amazonaws.com/fadupazageraf/asrock_z77_extreme6_overclocking_guide.pdf
    • http://limufij.myartsonline.com/81995058439.pdf
    • https://s3.amazonaws.com/julexekubaj/rilixi.pdf
    • https://s3.amazonaws.com/lovomijelun/remogejewam.pdf
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_36f3c8764787473fbbf277ff9b14601b.pdf?index=true
    • http://kogisovaf.epizy.com/cancer_no_microcitico_de_pulmon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118fa.bin
be1203344afc63d3bea0e6c64b66f475bc9b365300541fee6f5ae213ad09e8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 5020 bytes
font_01_sfnt_off00012a04.bin
14eb565e41885b305419d579de93ab18b69f0469bc1c8deba73fad5db9665e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A04 11304 bytes

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