Malicious PDF — malware analysis report

Static analysis result for SHA-256 c761d2942960c336…

MALICIOUS

PDF

70.8 KB Created: 2020-12-07 16:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 422f158a28f836137322f331d26149c6 SHA-1: b20bfe6c92dd88c07b7c7bbfc90afd1fd688f9ca SHA-256: c761d2942960c336d7de6eabcf698168291687c61883713d35ca1668c7939c5e
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to 'Eureka math answer key grade 3' and a high-severity heuristic indicates it's an SEO redirector for phishing. The embedded URL, https://traffset.ru/aws?utm_term=eureka+math+answer+key+grade+3, is the primary indicator of malicious activity. ClamAV also detected this file as Pdf.Phishing.Trojan.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?utm_term=eureka+math+answer+key+grade+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87f2aa683c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_5fa0d142df7d0.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/dekek.pdfIn PDF document text
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/dokubide.pdfIn PDF document text
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/8e961f674648a43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f89992b42256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_5fa4f43c03573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f8e94682e1a7.pdfIn PDF document text
    • https://gapigapale.weebly.com/uploads/1/3/4/8/134896702/6283824.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d877dbcb-3623-4309-8405-d23ecd8b2571/ford_tractor_9n_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a506edd7-7e94-4351-a511-6f4623b0d8b3/275857730.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/boogiepop_phantom_light_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/formation_brancardier_marseille_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/coulson_and_richardson_volume_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/nixazuwugudufo.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/purpose_driven_life_study_guide.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_off0000d738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD738 5584 bytes
SHA-256: 16733a309b50eecbf24df9d5a353f4e658a02c72f4c1857dd3e61d8443b415b4
font_01_sfnt_off0000ea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 10728 bytes
SHA-256: 824ce1ef3da1b0d73febe0a073b47837e0ddcec1358188e081f4a4689eb2eb1a

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