Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d7f89df6c091cf…

MALICIOUS

PDF

34.7 KB Created: 2020-11-07 05:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 647a6e86272c8dd1b6abefe8f4f93728 SHA-1: c40a544a5d80590d58c8f92bd7e243d8e70efd14 SHA-256: 42d7f89df6c091cf861cb272a5befacb37a453bebe3d387194a3140ffb4e81a3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/123?keyword=pokemon+go+ios+spoofing+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_5f9f8ac4cd430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_5f919229b95bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5f9ce2fab7ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f9aee26884c6.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/ruzumeb/walmart_contact_lenses_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/negawazowik.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/fason.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/30600184533.pdfIn PDF document text
    • https://xukepuf.files.wordpress.com/2020/11/xigobin.pdfIn PDF document text
    • https://nixeporebumo.files.wordpress.com/2020/11/trading_psychology_2._0.pdfIn PDF document text
    • https://temobozuz.files.wordpress.com/2020/11/95471855296.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.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_off0000483a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x483A 5184 bytes
SHA-256: 69808257b320661e6d4061eed6159e7c8283e6217428c590945ceba975f4ef70
font_01_sfnt_off000059d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 10940 bytes
SHA-256: 7d2bfdf1c0ddbabd0de5a685e45521ac26655f5b6adc9263ba1d859adbcdbc72