Malicious PDF — malware analysis report

Static analysis result for SHA-256 452c5c0449122331…

MALICIOUS

PDF

78.0 KB Created: 2021-02-27 10:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9b1119f94b5edad4597d8f201a8ea6e7 SHA-1: 6a43689b5e9a6e7e1287c14627029f6ef57e47ef SHA-256: 452c5c044912233171453612c2f2c3849e48eb4ec30835f2effa98f96aa22c09
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://dafemum.ru/wb?keyword=mcsa%20windows%20server%202016%20study%20guide%20exam%2070-741%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_6035e4bfede3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_5fea40760de57.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/hjiWjiq/50020768256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493579/normal_60192cc74693e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_6014031e1bea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_6036ab95c71a6.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/alexander_the_great_empire_map.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/modo_de_produccin_de_la_comunidad_primitiva.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/polexebuj/dufesosi.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/3853431675.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/amphitryon_ignacio_padilla.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/mipil.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/o_poder_da_kabbalah.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/conference_board_of_canada_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/68640300533.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_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 6452 bytes
SHA-256: 3b1bd2714c91cd9ca11b471c0e83f98b299ee20b9a80ab4c11056ca77ac8b1c0
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 10660 bytes
SHA-256: 2f982d14858140744c46b6ebab25cbb6a14956e5ebb677fdc97b9743b8f79d5c