Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e3367e8c10dd89…

MALICIOUS

PDF

47.3 KB Created: 2020-07-12 21:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 27a52396720ca1ba1402a8c2edb2f417 SHA-1: 16a45d46b67fb3cdacb5d1b36d35757be6a394ea SHA-256: 74e3367e8c10dd89e078fa946eb74cc8e6037e942040fafca27cca6b75897bc4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to redirectors and potentially malicious sites, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The embedded links are likely intended to lead users to phishing pages or download further malicious content.

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://ttraff.cc/wb?keyword=rrb%20ntpc%20simple%20interest%20questions%20pdf In PDF document text
    • http://files.possibleframe.com/uploads/1/3/1/0/131071312/jijonel.pdfIn PDF document text
    • http://files.minibaraddict.com/uploads/1/3/1/8/131856317/3290c6d6895a.pdfIn PDF document text
    • http://files.trappersrunningclub.com/uploads/1/3/1/6/131607164/658057.pdfIn PDF document text
    • http://files.risingearthcreationmyths.com/uploads/1/3/1/0/131070459/8339432.pdfIn PDF document text
    • http://files.chapmanatsea.com/uploads/1/3/1/3/131379049/ludanavasi_fodafamutero_xabowenut.pdfIn PDF document text
    • http://files.kingdomhvac.org/uploads/1/3/2/7/132710661/norex-dunajilodafu-gatozorusax-kewituvosugir.pdfIn PDF document text
    • http://files.nchconference.org/uploads/1/3/1/4/131455621/83f106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sexorewidejo682915272.files.wordpress.com/2020/06/43705382154.pdfIn PDF document text
    • https://dunawudawoma.files.wordpress.com/2020/06/xujerexeribulopabasid.pdfIn PDF document text
    • https://sugewufuze.files.wordpress.com/2020/07/11731121790.pdfIn PDF document text
    • https://fokafogamis.files.wordpress.com/2020/07/valimotoninenanugivifop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/31867794206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/wojeruvivitibegulum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/zavobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/81283089168.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 5244 bytes
SHA-256: dd0a8b5db1f4a3d9591f695b6a9fdca3a6349aadc379f7bbd7b5afc98d2150cc
font_01_sfnt_off0000870e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870E 12456 bytes
SHA-256: 87a8c1ff6a5a6dfd0e0bb360a384db8afd630bf6730a8ab88e40339188fd1f2f

Open this report in the interactive analyzer, or submit your own file for analysis.