Malicious PDF — malware analysis report

Static analysis result for SHA-256 1643e1c3ab720733…

MALICIOUS

PDF

69.8 KB Created: 2021-03-03 13:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cbeb1831920fb4f4bdd975b12854d6dc SHA-1: 9ed8905ff49e009cbe3b309d369b9af8cb313dc5 SHA-256: 1643e1c3ab720733ceab921f557728acbdd1cb4ed6182f6ef0d9f0e0f3c0b7ad
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://midufefew.ru/wix?keyword=darwin%2527s+natural+selection+worksheet+answer+key PDF link annotation
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/duvusenuforurik-votizunewevewe-bonofura.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/5676628.pdfIn PDF document text
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/detumuj.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/ykxSDgc/54721985455.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/1hdUmeK/free_photo_collage_app_apple.pdfIn PDF document text
    • https://paxupodef.weebly.com/uploads/1/3/4/7/134763896/gajojabamawexab_tovij_vamejarudosik.pdfIn PDF document text
    • https://tufuziboserivu.weebly.com/uploads/1/3/1/6/131636644/bf4a8d9a741b6b.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/4k_video_er_for_macbook.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/0cc40.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/magaxexew_zumebotebo_sazat.pdfIn PDF document text
    • https://mivosubewo.weebly.com/uploads/1/3/1/4/131407796/c6f89.pdfIn PDF document text
    • https://fexejazawipezes.weebly.com/uploads/1/3/4/8/134869354/rokapigomu_vujexo_jesugivamavog_doxupoketisi.pdfIn PDF document text
    • https://bajarewejewud.weebly.com/uploads/1/3/4/6/134673735/0601566.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/channa_mereya_ninja_movie_filmywap.pdfIn PDF document text
    • https://wobanuwu.weebly.com/uploads/1/3/5/9/135959505/dawoderoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zararogesa.epizy.com/human_film_yann_arthus_bertrand.pdfIn PDF document text
    • http://jipokogave.epizy.com/tilebifagixowuzov.pdfIn PDF document text
    • http://lizomepikoxi.epizy.com/33723568275.pdfIn PDF document text
    • http://bezepegu.epizy.com/hills_w_d_canned_feeding_guide.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_off0000d6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AA 5180 bytes
SHA-256: bf404bfd4bd0b28e1ff5f5bdd34ddfdf9d33b6e3cf0415058c646335a9790692
font_01_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 9812 bytes
SHA-256: 607747447ff886231a9908b4f5b64c1bd0fb8c707e25d4eb4eedbde08dca1e64

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