Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd0b1c5cb5537dd…

MALICIOUS

PDF

73.0 KB Created: 2021-02-15 18:54:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f82d627d7d25edd58bbe6d9a1162a4ad SHA-1: b48e57cf695836c1c3ed8527e52f33e4cd4bb7d3 SHA-256: fdd0b1c5cb5537dd242be117ef6c4bd960323fd9c0c6ae0287672f1d89695e9e
254 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
  • 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://crophysi.ru/wix?keyword=derby+city+classic+pool+tournament+2017 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465024/normal_5ff5d244dae14.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/gamararodi-bolija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369773/normal_5ffb2b336cccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60141f0e9fdee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482853/normal_5fed309c5c27f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5ff2af2d3c4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fd3dc0f868f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5ff52efd393c6.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/903387.pdfIn PDF document text
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/6b0b933435.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muduwabu.rf.gd/fivotiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/android_tv_forum_bg.pdfIn PDF document text
    • http://novozozoto.epizy.com/sofotegawomonetu.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/baby_love_you_english_new_song.pdfIn PDF document text
    • http://vanepozimor.rf.gd/kannada_sad_feeling_songs_free.pdfIn PDF document text
    • http://wawutanow.epizy.com/jamajogol.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_off0000df4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 5724 bytes
SHA-256: 872f0ff684e92a40c41e81d7a4ba08724296d88ece34ecd4be2cbc575c666e8b
font_01_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 10780 bytes
SHA-256: 3ec3a9ce1c8ec9f7cde9ea7fd57cd318e4cc388c13024dbad7aa6feda2f68295

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