Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0d6434054719bb…

MALICIOUS

PDF

72.2 KB Created: 2021-01-26 03:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c330e45d727a21637a6db23df9affbc9 SHA-1: 2855ed0b5e16340c41294c1eac99254c2197b0f8 SHA-256: 9f0d6434054719bbec26fe7bd17a34c186dbb5b77b30a100156b58411ad378a6
196 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
  • 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://baarspo.ru/wb?keyword=easiest%20way%20to%20sharpen%20a%20reel%20mower%20blade PDF link annotation
    • http://legejuwarowu.22web.org/masoguvax.pdfIn PDF document text
    • https://soluvixam.weebly.com/uploads/1/3/0/8/130873975/ea6cdd49.pdfIn PDF document text
    • https://wivexisi.weebly.com/uploads/1/3/1/0/131070498/6380fe0.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/e94153f4c8f.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/9658878.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/virata.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/c4d3e72d.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/30eee.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/rujimidujek/vivaldi_spring_sheet_music.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/argumentative_essay_topics_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/luvoxujixidimojedo.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/ruruz.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/operation_management_process_and_supply_chain.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/wink_apk_4pda.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/mpsc_forest_service_answer_key_2018.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_off0000db0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0E 5488 bytes
SHA-256: 99f24b1317bad4406fd86f7f0f12a214874ea28bbb8edbc745ee26bde068208c
font_01_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 10588 bytes
SHA-256: 06db5bd98f3ae172cbba230824b7fc54eb9d5e98bedc3fced6ff203eb1b8b32c