Malicious PDF — malware analysis report

Static analysis result for SHA-256 1119577ef6d9bd16…

MALICIOUS

PDF

73.9 KB Created: 2021-02-08 11:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0799fe9c69541568380475d1a8b4a510 SHA-1: ade4f97444f478cad56397bb57a1ed3aaafdf36a SHA-256: 1119577ef6d9bd16d2f827f23ecedea1c04de75f3755706260bf15c7df510e87
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/aws?utm_term=distributive+property+worksheets+for+3rd+graders In PDF document text
    • https://cdn.sqhk.co/nomazotesi/jdUjbgj/push_and_pop_in_python_3.pdfIn PDF document text
    • http://cartest.pro/osrs_blue_dragons_guideq7c75.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/4jgiXyo/famigu.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/belamepavu.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/jicjgmd/xenepivepafifum.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/telaxaximepiga.pdfIn PDF document text
    • http://reduslim-italy.site/28908161765fvpur.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/oLhuiec/supersprint_race_exhaust.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/kuboki/runtuhnya_dinasti_abbasiyah.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/69366470293.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/58694863137.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/lafafu.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/11289955512.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/futilutiseteto.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/desco_wrist_strap_tester_manual.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_off0000df13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 5892 bytes
SHA-256: 496b6d75a6a9b14e61cf1ded05d5626052af7ce60f09921355fdea85621ed029
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 11568 bytes
SHA-256: 7e5fcb9b205230b1f0da28c1d1ec73f46c80631e9f6967e22fee2736e0a36830

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