Malicious PDF — malware analysis report

Static analysis result for SHA-256 218b103e23d72a8d…

MALICIOUS

PDF

78.1 KB Created: 2021-02-23 22:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 980046e50dbe17cb01412b77ddd8a8d0 SHA-1: 024c805f12823d7678fd94a12ce4ff3cde6a11a8 SHA-256: 218b103e23d72a8d5bf44f027f9ab12f1f07868e6f25e87601bfe1f3fc880c9e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://crophysi.ru/aws?utm_term=samsung+galaxy+s4+mini+battery+best+buy In PDF document text
    • http://bamovewube.22web.org/riello_burner_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/fjhzajh/printable_christmas_bingo_cards_with_numbers.pdfIn PDF document text
    • https://jomokojexenubi.weebly.com/uploads/1/3/4/8/134877089/7855157.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/mavujolo-metur-bopapuzipugexil.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/eiihfIc/popular_nail_designs_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Jvohdtr/tumblr_girl_drawing_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/higgjfU/high_sea_saga_cheat_apk.pdfIn PDF document text
    • http://alifan.store/48969790703c0tsu.pdfIn PDF document text
    • https://rovisudaguxu.weebly.com/uploads/1/3/1/4/131438800/rejekosebuvofevukik.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/hbdagcC/live_weather_forecast_dallas.pdfIn PDF document text
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/cf9a1.pdfIn PDF document text
    • http://uabiomanix.xyz/ipad_mini_5_release_date_ukyfn6v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_600bbb9c98a67.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/yicjcvF/pixeldot_color_by_number_pixel_art.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikatamuk.rf.gd/baby_emoji_pictionary_game_answers.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_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 5508 bytes
SHA-256: 59fc443424940d9e6be01a5c6ad40329f411e6e718225996a3de904edd71eb1b
font_01_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 10980 bytes
SHA-256: 1838d23a882635de93df1b4b607319eb8ee6ff1ed514983387dd0a07c9cdc4f4

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