Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde74e5d1e9a7c19…

MALICIOUS

PDF

69.8 KB Created: 2021-02-22 09:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4c94c15eb2bf0a865481e80c64520be7 SHA-1: f5f1842f5422e63ec47a4259aecedf467baaea28 SHA-256: dde74e5d1e9a7c193aa09b40265e677258ed27e82f52dc04f8a836c5a1cce6fe
254 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
  • 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.
  • 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=taotronics+bluetooth+barcode+scanner+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_6015ba1e1ddf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_60245f0fe4074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5fe720de15974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5ff25615630e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_602dd48e79831.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/dudup_riramanumovu_puvudelam_jijimawetotiv.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/gijahfU/modern_poweramp_visualization_apk.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/xukirizugukugi/mifubotetevevetofomologa.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/why_is_my_frigidaire_ice_maker_leaking_water.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/wesubolovolunagogarulado.pdfIn PDF document text
    • http://selanas.rf.gd/how_to_reset_lorex_nvr_without_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/7048772049.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/66878568396.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_off0000d583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD583 5268 bytes
SHA-256: f98fccf1a3bfe61c2321851e03a4c39143de9bae10c4b67acbb69c7e420f88f1
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 10192 bytes
SHA-256: fe7bf2c5764ed256ecab9b472b72f737f825fcabd654b52cee8d0f0238521d65

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