Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dabdf0b8f0bea05…

MALICIOUS

PDF

73.4 KB Created: 2021-02-21 08:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03d0083bedfdf46ff0110abcc57ab713 SHA-1: 24ba3a772e66f2bda72a839bd142777c22130cc1 SHA-256: 5dabdf0b8f0bea0579fa91eed928181a2c3343d3b146e0d513c02ed1b84f000f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jottigo.ru', which is likely used to redirect the user to a phishing or malware distribution site. The presence of multiple embedded URLs further supports this. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=irish+english+pop+culture PDF link annotation
    • https://cdn.sqhk.co/rojarimeg/zhgFRih/murder_cases_us_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fe0930d363fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_601708d152d79.pdfIn PDF document text
    • http://yewes.space/debriefing_the_president_downloadvvbq6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495536/normal_5fdebb8d28886.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/jhxDigd/gurovanideradibupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372740/normal_5ffd6ec83d378.pdfIn PDF document text
    • http://smartline58.ru/tanagilatebixadbzlx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3af48ec9a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5ff7bf56dd893.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/jigezilor/pefaderojiv.pdfIn PDF document text
    • http://vuremekewema.rf.gd/advertisement_worksheet_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/spreadsheet_to_keep_track_of_monthly_expenses.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/case_simulator_2_hack_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/xenezugexagamav.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/45435143540.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_off0000e42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42B 4920 bytes
SHA-256: 8da89aa8b2dc901e087f0e28b245e6fbd81a6586e10451214fb2cc410da58e06
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 10420 bytes
SHA-256: 019a184b3af509a30965988fa119e8c967b984a56dfd6189a0138fc8aeffdf6e

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