Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1db53873db6b6ae…

MALICIOUS

PDF

72.0 KB Created: 2021-02-20 05:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: efce88e2adbb5e2e15aaaf94e7a79bc8 SHA-1: 71011e49e669909dee476c202835142ead99a90b SHA-256: c1db53873db6b6aefbb2e4d206904f2ad64f4b3211e06e78323f20e3c38ef6a9
184 Risk Score

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://yafferge.ru/wix?keyword=alphabet+dotted+lines+worksheet In PDF document text
    • https://xusikezawijuxop.weebly.com/uploads/1/3/1/4/131407227/08a5f7f6b96.pdfIn PDF document text
    • http://4kuhd.me/nikon_d5200_dslr_camera_manual64shl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fd64e112ecc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413969/normal_5ff05c4e0e79d.pdfIn PDF document text
    • https://kazowotamije.weebly.com/uploads/1/3/4/0/134012594/8262314.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/duO52jg/football_training_tips_for_7_year_olds.pdfIn PDF document text
    • https://xojemejavema.weebly.com/uploads/1/3/3/9/133987363/980be84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489586/normal_5fdbd0eccd2cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_5fda251a2859f.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/dhj3ghC/cute_valentines_day_cupcakes_decorating_ideas.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/pikomiz_laxevipeju.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/dij7Rib/download_pocket_arcade_story_dx_full_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409421/normal_60268049a7e4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomitobovuni.rf.gd/nifobodi.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/dmv_written_test_answers_2019_california.pdfIn PDF document text
    • http://fuvogel.rf.gd/29305728452.pdfIn PDF document text
    • http://nadiripu.epizy.com/the_2019_esc_easd_diabetes_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/lelefexazukuvebexos.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/avakin_life_apk_mod.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_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 5332 bytes
SHA-256: 6cb817398cff55c568f1b34fa5e256a59db1ba6ffa64320ad0f194dfff4606fe
font_01_sfnt_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 10200 bytes
SHA-256: 7e745b1fd84e084b9b33034ce82b26f0b9a7d5fd4042c0ea960c20bd77e68743

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