Malicious PDF — malware analysis report

Static analysis result for SHA-256 3975566eed54019f…

MALICIOUS

PDF

71.8 KB Created: 2021-02-27 18:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 82ede4299cb5591c53a8f07b95d9fc3f SHA-1: 1e15126e8a8406ff469a30dc2657babf5735eede SHA-256: 3975566eed54019f4895a2768c4c886bd7bc0db10b1863bdd78eba529f4f6833
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/award?keyword=letter+of+credit+example+doc PDF link annotation
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/jorosagixemituletid.pdfIn PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/6219bf69d7d9.pdfIn PDF document text
    • https://pedumodab.weebly.com/uploads/1/3/1/6/131637036/dopexenukinezoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://risumizu.rf.gd/convert_to_word_adobe_reader_touch.pdfIn PDF document text
    • http://rawatakutuju.rf.gd/33067890807.pdfIn PDF document text
    • http://jugadogakovose.rf.gd/clash_of_kings_hack_version_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/laptop_camera_app_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/gamevisesoxapasodamoga.pdfIn PDF document text
    • http://joxamemi.epizy.com/35293211645.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/seguzodipuwojoxo.pdfIn PDF document text
    • http://gefifeji.rf.gd/minej.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/report_builder_3._0_datediff_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/45629549159.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/72158306127.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/convert_bitmap_to_drawable_android.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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 5132 bytes
SHA-256: 9b66ee12844f8e383d12b88d24c706ee0a3e260ee6804bd522bbd5619dc2f346
font_01_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 9948 bytes
SHA-256: 4596b41709c081dea483767db761b68e5769ea74aad389e1ecda5b936e74ce18