Malicious PDF — malware analysis report

Static analysis result for SHA-256 4644fd6c470d3e6e…

MALICIOUS

PDF

73.2 KB Created: 2021-02-24 07:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10a61dae45232812651c0e1703597073 SHA-1: 3c74f1b4870cb0bab9b6abcd7b7be3496b31ab0b SHA-256: 4644fd6c470d3e6e2748435b337419d1af7f267e04ce270b969d4fa01347d790
196 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
  • 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://maypoin.ru/wix?keyword=toys+r+us+direct+deposit PDF link annotation
    • http://bestunew.xyz/asus_install-_drivers_installation_wizard_freectpu8.pdfIn PDF document text
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/tufovawigadojewob.pdfIn PDF document text
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/panutulew-xewok.pdfIn PDF document text
    • http://vykupavto54.ru/68087931196fdit1.pdfIn PDF document text
    • https://sadebisoj.weebly.com/uploads/1/3/2/3/132302749/linuvujuviveligi.pdfIn PDF document text
    • http://gomikugulud.22web.org/kugitalovosuwa.pdfIn PDF document text
    • http://kugimanuvo.iblogger.org/latest_bollywood_movies_hd_mkv.pdfIn PDF document text
    • http://gigurokubi.66ghz.com/babatusaxisaz.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/7196495.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/begijufadi/wodal.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/wujunejifi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/wuzuxukokukusebuxebevaguw.pdfIn PDF document text
    • http://konuxosukizegu.rf.gd/como_hacer_una_propuesta_de_trabajo.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/best_root_apps_android_9.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/cholamandalam_car_insurance_claim_form.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_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 4876 bytes
SHA-256: 6cdb2b1ca63473b148cc59b9e6f3815ef06c511e822cd0576dc6c839b7bf4222
font_01_sfnt_off0000f34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34B 10708 bytes
SHA-256: 06e86a178a7d583ea0dbc2c098feefc748e350403f16e973795b3737c7496e05