Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a5d2e100f4977b…

MALICIOUS

PDF

67.3 KB Created: 2020-12-18 07:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6f6feae71dcaba87b35f64f2e9411b1e SHA-1: 924ddfcc92965af758b96ebee4afe805e9767cbd SHA-256: d3a5d2e100f4977b74078317af94a32336a1be930961d143206c8b5cfd8e0419
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains an external URI and an SEO redirector link pointing to 'https://traffnew.ru/123?utm_term=what+stores+material+within+the+cell', which is indicative of a phishing lure for a free download. No scripts were extracted, but the overall structure and heuristics strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=what+stores+material+within+the+cell PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fb4a32799fae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fc758e086380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f88379be25d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5f95212582a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5fa962004f406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f90c1ed8be4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5fd76bb33895b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_5fa194975e4ea.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/xopugup/how_to_lock_columns_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/game_bejeweled_2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/krishna_and_radha.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10966a879396864091016/t/5fc145ed9ee0f32b8781adb7/1606501869185/vakakapejitonevanekule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5145da3bf4b14abc40464/t/5fc9f39252b5874c8594b642/1607070611159/game_sticker_for_whatsapp_2020_happy_new_year.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 2

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_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 5144 bytes
SHA-256: df699a80a2cb5e54467265053762efcf8917eb7bbf4109bad1099b8cb3c0dc61
font_01_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 10336 bytes
SHA-256: 76dfab75d245a9df9efb1a3e941b65f2da2b8cb84e30062c3f2d08749cf960c2

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