Malicious PDF — malware analysis report

Static analysis result for SHA-256 2958ef1fe1c30390…

MALICIOUS

PDF

68.2 KB Created: 2021-02-12 00:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e3041f0cc9cca576857b18d734ed982a SHA-1: 9661984d68b084ced7c43dce317e1f91e9991305 SHA-256: 2958ef1fe1c30390b1d1592a429a32c5350bd07812dfa6c62edc9f175f100082
254 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
  • 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/wix?keyword=gta+san+andreas+apk+free+download+ios In PDF document text
    • https://cdn.sqhk.co/jogekiluse/gOJW17W/defense_zone_2_hd_full_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_6023a0bc49833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_5fdb2d502b1bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5fcb30616dc02.pdfIn PDF document text
    • https://cdn.sqhk.co/mapuvokunoj/gchcgda/64372726280.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/jedalimedenerir.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/WXCnNwY/fall_guys_wallpaper_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5fdbd51d5ccc0.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/2313470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fe8c79e01967.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/iflkOjj/plants_vs_zombies_2_online_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/7jcibyL/greatest_hits_of_all_time_playlist.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/dabatisew/spider_man_homecoming_cast_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/agricultural_science_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/jukawis.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_off0000cfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAE 5220 bytes
SHA-256: 1eb83e13d4df09a96ce540d513069db01fd5759e0a9b0ad84c9aa6c585d822c0
font_01_sfnt_off0000e19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19D 10072 bytes
SHA-256: acecda4206943b068108329c42b1dcbf89e18ec8d6491c4eacfed8517ef70ec2

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