Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e48458e4d6571c…

MALICIOUS

PDF

72.0 KB Created: 2021-02-19 03:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0e476d41245dd1ddc18dad9456fdb8e4 SHA-1: 959432a4d0b60604b9d37476b40d3b163e6ab949 SHA-256: e1e48458e4d6571c30f0fcebf23f56a2e8a4f33ea5719a4f4486d22042330ae4
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 'https://yafferge.ru/aws?utm_term=calculadora+texas+instruments+ti-36x+solar'. This URL is likely used to lure victims into clicking on it, leading to a phishing page or malware download. The ML classifier also strongly flagged this PDF as malicious.

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
  • 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://yafferge.ru/aws?utm_term=calculadora+texas+instruments+ti-36x+solar In PDF document text
    • https://cdn.sqhk.co/kogujipubap/db15jap/somiwutizoviba.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/iiibjbi/super_dancer_chapter_4_winner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_601a7d3fbaa24.pdfIn PDF document text
    • http://pannochki-art.com/emiway_khatam_song_mp4t3fgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_6014a4859a308.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/bidighh/24606556082.pdfIn PDF document text
    • http://present-mag.ru/fistulogram_radiology_reportgbztq.pdfIn PDF document text
    • http://onsideball.info/garmin_nvi_2595lmt_usb_cable32we7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_602567efc954e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fee821f79fc7.pdfIn PDF document text
    • http://makeyourself.xyz/bittorrent_filehippo_freekk7cf.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/vukujidor/rejajolu.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/83717396704.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/australopithecus_garhi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/sidiravubuvofejom.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/coordinate_geometry_class_10_question_paper.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_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 5408 bytes
SHA-256: 6e6356fd53dc72fcac19a07a13dcc9cd78523d3448b32c3597b4717793f04a1b
font_01_sfnt_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 11372 bytes
SHA-256: b23d1f1cb3ce040692683fe036ff6d47c0f14dd8907776c04c8679ab0834c40f

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