Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b90d25c8ca9c31…

MALICIOUS

PDF

71.7 KB Created: 2020-12-14 08:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 28a8e4950f1ae1f445c633c621dab25a SHA-1: e3edf74a6b3d252bcffd1a1b1b3ef012f84edc92 SHA-256: 93b90d25c8ca9c31668779ed5021d2e62c9bab6afc12cc7d8e154d9bb626270f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a link that redirects to known malicious infrastructure, identified by multiple heuristics as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which is likely used to host or deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=ccpa+full+form+in+india In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc293a78ef7301f8b1b7b85/t/5fcd679274a40730fbac1ea3/1607296916625/64005310888.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/vubefipiwogelonel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf4331d-09e2-4f81-873e-2a8a876918d9/49883182737.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceff5d181af13ce2744de0/t/5fd63a9872b1137fa970a30b/1607875225207/33101129184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afda861-6557-4d93-8407-f139ee873d54/motivation_2._0.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/free_simplicity_s110_sewing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bcca75-1fa2-48e8-8032-9be96f847baf/xoxonegidotorid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1a6a3570fb44d1cba083/1606294134921/xunofujijolizoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8aa69b-116e-4293-b3b3-c41ae9f293d9/mono_blue_tempo_sideboard_guide_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5608abe9b69395128be43/t/5fd13d9b1ae63e4841540b2c/1607548315904/mesibuputipelezuxorizibo.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/suvutu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17ddbf9866f3fd2d885d9/t/5fc872b88eecd53e39eb4eeb/1606972089169/kasuveruti.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/7422831521.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff243ca23154c95bc92a/1606221604946/lamedutaneremijuveniv.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 4

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_off0000db05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB05 5028 bytes
SHA-256: 2ed5a56f60303066beebabb45ddedce96a73aa01c2972513bee061645148adcf
font_01_sfnt_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 11144 bytes
SHA-256: ca38b24cf264edeba62e092fd51bb7ff2d085b8ef3e840c14352f5d5e0121a79

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