Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c8af761c8db0f5…

MALICIOUS

PDF

99.2 KB Created: 2021-02-16 08:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7f71121c9002d12b058c0931632d2392 SHA-1: d95c48fcff59a7e346183332731d6df7888f009f SHA-256: f1c8af761c8db0f50f336d7ad0358dd1c8a25c1c09f207a7dc1529910ee6ba39
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics and embedded URLs indicates the document is designed to exploit users by directing them to external resources.

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=describe+the+information-processing+model+of+learning PDF link annotation
    • http://prequester.online/3d_werewolf_gamexi6t2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466391/normal_5ffd6b6e55e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_601213d017c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6028f8429fd40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368467/normal_5fee6d6e6990e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_6027907eb2102.pdfIn PDF document text
    • http://xurufotuzu.iblogger.org/awning_ground_sheets_for_caravans.pdfIn PDF document text
    • http://ecoterritory.store/swing_flyer_rideod8ch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425484/normal_5fc71f989192c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481999/normal_602115cd0ee13.pdfIn PDF document text
    • http://pmaider.com/lemon_crinkle_cookies_with_lemon_frostinggcqfs.pdfIn PDF document text
    • http://peludofnor.fun/cute_anime_girl_with_white_hairp11xl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fd1f7a75e71c.pdfIn PDF document text
    • http://italiabeach.space/jonujevogodefipew6izie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokidudelilusib.epizy.com/marvel_mighty_heroes_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/competitions_guide_com_au_login.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/best_riddles_and_brain_teasers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/tes_33_battery_tester.pdfIn PDF document text
    • http://kasaxamaburabuz.epizy.com/cyberghost_vpn_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/accenture_aptitude_questions_and_answers_with_explanation.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/mufazopol.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_off00014726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14726 5740 bytes
SHA-256: 070b75bcf8ad24bd942025ef7dd7a5334a14b7a95010507deeab545041a77ef9
font_01_sfnt_off00015a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A92 10620 bytes
SHA-256: f5e8aea7006f579e17aacb9f1bb3e1ef19ba99f5b482f30d408ed4f34458ee16

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