Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f19ccbd1779327…

MALICIOUS

PDF

70.2 KB Created: 2021-02-12 01:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 798f7a1d1477c9e76ea19e62035f9a90 SHA-1: f2abd6d8fc851c2fbcdf19025e86937bcd7c7abd SHA-256: 01f19ccbd1779327358208e373fe0cf4c0118aefba6b9a8ab221a114d729c67e
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=retractable+extension+cord+reels In PDF document text
    • http://rijepesejib.22web.org/captivate_vanessa_van_edwards.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/6SPtqjv/onelogin_protect_collin_college.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/KibBFia/36459018184.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/hbidSQe/jokiv.pdfIn PDF document text
    • https://cdn.sqhk.co/muwupajikaro/fMajjhg/fun_words_that_start_with_a_j.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/9jF7osM/nomav.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/DCMgjha/safe_notes_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/jdjcgek/zaxujojuwutowapopesuxe.pdfIn PDF document text
    • https://sadutixonigonu.weebly.com/uploads/1/3/1/4/131412491/873209cf078.pdfIn PDF document text
    • http://palejep.22web.org/47603058081.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/d7LUSoX/koveguxowiviludesepuxos.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/hbOjbib/86346269831.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/HhiHiif/paul_hardcastle_19_extended_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patilawasu/zalebi.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/85930314310.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/91021943569.pdfIn PDF document text
    • http://tenowuwewid.epizy.com/zudelujutako.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/karnataka_mca_cet_answer_key_2019.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_off0000d586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD586 5148 bytes
SHA-256: 04032e044197ebe098f788710dc8e8a777881e8f697a645a534ff855e1a24557
font_01_sfnt_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 10808 bytes
SHA-256: a06223236938505c226a8c14f6561850e41b84096cf80e7e8464da3c011ef10a

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