Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddcbc112cdf9d7a…

MALICIOUS

PDF

112.5 KB Created: 2021-02-19 19:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ef97fb656c19d23eb2ab4447dc70f8dd SHA-1: d11401455647657016d1111507fd18b9d868c2d3 SHA-256: eddcbc112cdf9d7a7fbcfbcd98449c077ffa7f3b7042d4040c10a3eb41b30832
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded external URI pointing to 'https://crophysi.ru/123?utm_term=why+is+the+psychoanalytic+theory+criticized', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a theme related to criticism of psychoanalytic theory, likely a pretext to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=why+is+the+psychoanalytic+theory+criticized PDF link annotation
    • http://madewithsunshine.com/full_hd_background_pics_freeqtb1c.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/ihFnHjf/applecare_rewards_program.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/LgfMiiy/cricket_wireless_phones_quick_payment.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/vovagufotutasonav.pdfIn PDF document text
    • http://berozava.iblogger.org/fajunozopomefuw.pdfIn PDF document text
    • http://meetchambre.xyz/suwetafinevidumuwitigunippnuef.pdfIn PDF document text
    • http://markettop.pro/futozubaxofumopadr937c.pdfIn PDF document text
    • http://bottlechainworld.com/zawunidogz4jg.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/fezenur/befijekonerodovunabesowi.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/dodikudafeburevejaxifuwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/mubuloz.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/river_water_pollution_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/quickbooks_online_billable_expense_report.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/guide_tourisme_beyrouth.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/kuruxikewijeboka.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_off00017d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D2C 5328 bytes
SHA-256: d5f36c6fcda7318fe37e2bd5488bf8b3455713e1c535520921b78063b0476a75
font_01_sfnt_off00018f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F5D 11004 bytes
SHA-256: b1f01af26edd5a29944c96fd03f009790c104e0a30665947d01175ad211e62b0

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