Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3821944ebf7b10…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 03:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3d032fd3a5d89eb2d9a17b10291f5ddb SHA-1: b7f2cc3080dfbc8ba06794f207cf383a25df0701 SHA-256: bd3821944ebf7b10ecdb538c9eb35fb3662d8e3e045fdde737d3988add063306
196 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
  • 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.
  • 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://fokemale.ru/wix?keyword=660+curries+pdf+download PDF link annotation
    • https://cdn.sqhk.co/zulatobi/eImfijj/nezemoropudiwabugo.pdfIn PDF document text
    • http://rowitewufow.22web.org/moruromaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/4FghtCO/65285902639.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/hggZPRy/philadelphia_flyers_promotional_schedule_2019-_20.pdfIn PDF document text
    • http://fitokaps.xyz/functional_movement_screenci26h.pdfIn PDF document text
    • http://tusapet.iblogger.org/sakimelu.pdfIn PDF document text
    • http://sabujunakeves.iblogger.org/pekuxedukobususuva.pdfIn PDF document text
    • https://cdn.sqhk.co/bomagomax/oDifDLL/paximubelasoxinapejuwo.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/2989105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxunefilat.epizy.com/android_arsenal_expandable_recyclerview.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/soxivuwogixabodeko.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/sacred_games_season_1_ashwathama.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/dnd_character_sheet_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/4364967949.pdfIn PDF document text
    • http://pijularof.epizy.com/51008088003.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/jasperreports_library_6._9._0.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/7470521260.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_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 5444 bytes
SHA-256: ba704c1cae8a79fe91a3527c9a44ab11f32029275c6a0ca9c192059d9045d541
font_01_sfnt_off0000f3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 10432 bytes
SHA-256: 2a3567f8f31c4f6264f13b48dfda0cd2e0840ef0111e30ba4ed4995a300dba23