Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7761ac052327e94…

MALICIOUS

PDF

74.4 KB Created: 2021-03-06 18:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: faa5ce0dd0665015d3948b5a6f425c8d SHA-1: 428c1f2b7dc19216e8e3565f84fbd4709a99032e SHA-256: e7761ac052327e94d0a61085ca3e908116b00120bbfb2bf7f1ccfd202e436d86
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/strik?utm_term=how+much+do+pr+account+managers+make In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_603d42e717f80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420934/normal_5ff0cc3395793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413713/normal_60040ea31db76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_6032fbd72a46e.pdfIn PDF document text
    • http://kozijadeji.22web.org/psd_floral_designs_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529087/normal_5fe37355a2158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490375/normal_6006e6ddb34c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5fdb8ade274ad.pdfIn PDF document text
    • http://nisaledax.iblogger.org/hunters_hunted_character_sheet.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/wefemabeni/the_lightning_thief_chapter_16.pdfIn PDF document text
    • http://kerizow.epizy.com/allah_hu_allah_islamic_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/street_fighter_3_2nd_impact_apk.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/aankh_marey_simmba_song_mr_jatt.pdfIn PDF document text
    • http://pegalisijeg.epizy.com/44147923942.pdfIn PDF document text
    • http://fudewalazakukug.epizy.com/87110352504.pdfIn PDF document text
    • http://nifiwirijapokaf.rf.gd/tenant_lease_termination_letter.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_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 5572 bytes
SHA-256: 1c60a4cc2aec21f75c742e43e419ab1cfe26b97bf525a60a748834324b8d2564
font_01_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 10972 bytes
SHA-256: 9cfe25ec87e29b3f32902de038b0f9ba7a63bdb49750d7c4f3f6d4dd00c3a4ff

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