Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee04bd06beca9824…

MALICIOUS

PDF

72.7 KB Created: 2021-01-30 19:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e6892df0bd2407113dbc110df36f8ce7 SHA-1: c88bdad1707d158043118224049ae07f47bab5e5 SHA-256: ee04bd06beca982470844006e06285e09ab160437621518f7bb434f534d7b5aa
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=alton+brown+baby+back+ribs+grill In PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_5ff2abf22d131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_60133a9e8e7f9.pdfIn PDF document text
    • https://pudesuvake.weebly.com/uploads/1/3/0/9/130969082/jisefuzujum.pdfIn PDF document text
    • https://lakupofudeb.weebly.com/uploads/1/3/0/7/130775354/1214499.pdfIn PDF document text
    • https://cdn.sqhk.co/vibefoparo/fYctFXI/61990960534.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/bifZXhj/81274415743.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/chjgdhd/highway_101_attractions.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/Zjagegh/gemumanuramorixunonafiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5fe6c898b16a6.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/mirukixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nutanigonu/delegation_poker_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/easy_classical_guitar_pieces_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/free_printable_blank_number_line_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/commando_2_full_movie_mp4_9xmovies.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/53233059784.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/cricket_rules_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD211 5024 bytes
SHA-256: 3bedee20e753f65d99f74c6ed773c1ee7e89731a2e551b772aa23e797a8648c2
font_01_sfnt_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 10484 bytes
SHA-256: 530af36d7ba0e4f5d7e6c6710f8f130f7b21556d5e58a1c9f57a1a71d9b4208f
font_02_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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