Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23bbfb8c2e8c106…

MALICIOUS

PDF

75.0 KB Created: 2020-12-17 01:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6a6d6b5a686277ac2b02fc7957769ad3 SHA-1: 76c0041cae704486c7be67c36ddd4a971a25e6e2 SHA-256: d23bbfb8c2e8c106303833170259ad9b4fe02ad96bcec5558105ddbae1b7cb13
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. A heuristic identified an image lure linking to an SEO redirector, specifically the URL https://trafftec.ru/aws?utm_term=best+guided+meditation+cd+for+beginners, which is likely used to deliver a malicious payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or malware distribution 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://trafftec.ru/aws?utm_term=best+guided+meditation+cd+for+beginners PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fce19773b4ad40d4a7f44df/t/5fd6891fc4373837b9114b0b/1607895328756/manualidades_para_aprender_los_numeros_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a3c4e0-dcc4-4b57-8716-4b46b746f77f/kuxiboxutizepil.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/jegotujete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91d77e5-fe19-467c-9d5c-540c6f8912a0/16345437233.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13d0827a199023ab79d37/t/5fcec02e76f3eb1a46cef0cb/1607385134579/tower_defense_games_cursed_treasure_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10866e5c7695ca99c5cd3/t/5fc95a2af6102f0e5ea1c09d/1607031338621/1127705161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99d2a61-50ab-497f-89ad-343731849e62/50876787690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ca9881-8b5a-4c15-9baf-ae648ad00ca1/borderlands_3_characters_fl4k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f40a31-ea4b-406c-a802-47395baae7e9/fuduzuragasigevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d2f2d26ff1194f734ddd/t/5fc2929ff3de5e49b5b8409d/1606587040918/steam_crack_download_2017_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/81729844492.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03ddb7a66e04eaf5debb/1606222813911/7747465664.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 1

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_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 5496 bytes
SHA-256: f96a125aa8ecd8b02ca927b0b423e5fafcc2b376b3f1b396e67a1617aba9265c
font_01_sfnt_off0000fae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE1 10660 bytes
SHA-256: ce209ddd1c646015fc9161280260c0c89fe497a82f0c06404b96b6859b787f0b

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