Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95e9c8422339cfa…

MALICIOUS

PDF

75.3 KB Created: 2021-01-20 06:34:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fd4a953ee62ccd018ec3e93cf331996d SHA-1: e475bda1e2fccf72bce44ce62b1bdc8d2c1951ed SHA-256: e95e9c8422339cfa558ac3c3525cc2bb0fdf2afeae36e6b6ccb28d03e878196a
184 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a malicious redirector, as indicated by multiple heuristics flagging links to disposable domains and known malicious infrastructure. The ML classifier and ClamAV detection further support its malicious nature. The embedded URLs, particularly those on disposable hosting, suggest an attempt to lure users to potentially harmful sites, likely for phishing or malware delivery.

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 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.
  • 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://ggtraff.ru/123?utm_term=ge+profile+dishwasher+recall In PDF document text
    • https://static.s123-cdn-static.com/uploads/4373526/normal_5fdebaea1e125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_5fe99b5e8b65b.pdfIn PDF document text
    • https://site-1247374.mozfiles.com/files/1247374/diagnostic_bacteriology.pdfIn PDF document text
    • https://site-1174957.mozfiles.com/files/1174957/99766200327.pdfIn PDF document text
    • https://site-1177098.mozfiles.com/files/1177098/brain_it_on_level_57.pdfIn PDF document text
    • https://site-1166600.mozfiles.com/files/1166600/wifi_doesnt_work_on_my_android.pdfIn PDF document text
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/dakilebuzatapudiz.pdfIn PDF document text
    • https://site-1173562.mozfiles.com/files/1173562/top_40_pop_radio_stations_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481067/normal_5fcb2f7945ca3.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/58659145547.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/4506051.pdfIn PDF document text
    • https://site-1176996.mozfiles.com/files/1176996/lire_la_bible_louis_segond_en_francais.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/popeniwiw_kipasabuwate_fowuxiwomifusa_kixoxaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_5f99428fad9ad.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
    • http://kajoxuf.epizy.com/android_x86_houdini_arm.pdfIn PDF document text
    • http://nakepusejedub.epizy.com/42087197985.pdfIn PDF document text
    • http://xumasadepa.epizy.com/kanmashi_chakkaramavin_munthiri_song.pdfIn PDF document text
    • http://jezowadu.epizy.com/exterior_angles_of_triangles_worksheet.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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 4968 bytes
SHA-256: 475f8073dcaf47f41ba4c0937556fd84199e6bfe9a9fc225cf6c84d06a497af7
font_01_sfnt_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 10724 bytes
SHA-256: bc0151776bc23120c9f75770ec31e6064910e82b192baecdaf937d0c20dc6914
font_02_sfnt_off0001115a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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