Malicious PDF — malware analysis report

Static analysis result for SHA-256 289e99471505467d…

MALICIOUS

PDF

70.7 KB Created: 2021-02-17 12:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8fb8273c93abf0e2b8386bdeef631a44 SHA-1: 43288ed9e288d01d3498929d6a140d55ee963a23 SHA-256: 289e99471505467d5d03c72549ddad507f9fc55dca0f51dc49402ef53052c144
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=royce+da+5%25279+allegory+free+zip+download In PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/nevafopo-merebomonupug-lopokajoganowam.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/wajup.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/7662406.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/leronikobinagixugela.pdfIn PDF document text
    • https://cdn.sqhk.co/texivewa/gCdhh75/tap_legend_hero_fight_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/gqD53If/granny_square_baby_blanket_edging.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/buKjal9/72468598247.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/piboganusuxijubetepedu.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/transformers_bumblebee_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/kovigojajozufutitijadune.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/clavier_physique_azerty_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/brutus_free_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/homemaker_competency_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/26932359039.pdfIn PDF document text
    • http://naxiziwakeguzor.iblogger.org/77595641194.pdfIn PDF document text
    • https://cdn.sqhk.co/nosisatoved/6hjUjg6/daxikivos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakilapug.epizy.com/83433664812.pdfIn PDF document text
    • http://vekujekodabudu.epizy.com/7460179773.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/bezuziwijij.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_off0000d654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 5712 bytes
SHA-256: a0eb7a17cbccc67b0b5f7933b3e142b0089b79143f7e88df80fe39a6e49a9996
font_01_sfnt_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 10264 bytes
SHA-256: 5ad568034f7131a708e376e38e9723881bb1c007846ca5838efc940d9106143f