Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da67b9af38e7e94…

MALICIOUS

PDF

70.8 KB Created: 2021-03-04 01:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: eb49e876e67121f92a7f4929b66ba0a2 SHA-1: 51b7296eb03537b5bf38e4f6303c21d45c83ee29 SHA-256: 5da67b9af38e7e9482d4546ce6f4de69b45eb74d384413e3859ad6baa0cf39df
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to programming a universal remote, which is a common tactic to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+program+a+radio+shack+5-in-1+universal+remote PDF link annotation
    • https://cdn.sqhk.co/lewivapawo/hijj4Xu/best_wwe_finishing_moves_2019.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/64828524474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5ff708867d8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fe62a7b374ca.pdfIn PDF document text
    • https://raromimuzu.weebly.com/uploads/1/3/0/8/130874361/8374055.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/a1Ezxhc/designer_rose_gold_wedding_shoes.pdfIn PDF document text
    • https://gibodogud.weebly.com/uploads/1/3/5/9/135994226/laxamibojej-xagug-wamufuwuw.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/jheheUE/draw_so_cute_ice_cream_bar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_600df97528d71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421210/normal_60037d27c464d.pdfIn PDF document text
    • https://zufogeseganoxe.weebly.com/uploads/1/3/0/7/130776657/bedekekebabejelef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471710/normal_6002dff0b2303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_603e64c22f4ad.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/kenwood_th-f6a_programming_software.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/mYcgfjb/xewikuresopalufumitodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_6019d93c47d86.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/5662951352.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/zizene/32629978328.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/gebisajobepabowabup.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/duvutegawefepasulovanen.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_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 5752 bytes
SHA-256: ffa6c46e3722ae9f16997523c22fb741ad3fda8c2c7d8126153ad45edf3c8523
font_01_sfnt_off0000dde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE7 9844 bytes
SHA-256: c6a90700532986e29bbc8756a93f4d49771743db389a26d31425e6e5ba9c1066
font_02_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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