Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff7d27d07da4304…

MALICIOUS

PDF

82.8 KB Created: 2021-03-30 16:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bcdb699070bee95177cbc5e5b82bfc3e SHA-1: aaa5ff6294adb39ed27237c753a45b170a35ff94 SHA-256: fff7d27d07da43046f28e7010a908ab47d153b9009f03bf610b5752362357a74
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an embedded URL disguised as a free download link for an Excel tutorial. This URL, 'https://jacksth.ru/award?keyword=excel+tutorial+2020+pdf+free+download', is flagged as a high-risk SEO redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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://jacksth.ru/award?keyword=excel+tutorial+2020+pdf+free+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/vapebizesovetesoxozemanem.pdfIn PDF document text
    • http://jisavimi.rf.gd/93066878616.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/malibu_lighting_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/padakul.pdfIn PDF document text
    • http://dudijujixafag.rf.gd/block_calls_on_android_6._0.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/chalte_chalte_video_song_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/79211067029.pdfIn PDF document text
    • http://bezetotosun.rf.gd/tesazozivabidogobibazimud.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/context_clues_worksheets_grade_2.pdfIn PDF document text
    • http://wifapig.epizy.com/texax.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/chitralahari_songs_in_sensongs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e088cba1-2425-4bab-b32f-52eefefedf78/rasozesegapezixazufezag.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/80466336640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cc4685-2b18-4ed5-9b0e-5fa209b4f394/borakigototovupojuxixaru.pdfIn PDF document text
    • http://merapuw.epizy.com/what_is_included_in_an_autopsy_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfef11d7-aed2-4186-be4f-25118b8b012b/2153642518.pdfIn PDF document text
    • http://jilerixam.epizy.com/aflatoon_marathi_movie_songs_free.pdfIn PDF document text
    • http://vimeniwofeb.rf.gd/libro_acls_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/electromagnetic_gauge_theory.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_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 5360 bytes
SHA-256: fc3e8bbaa2aaabb9ef2747e7b1a2b28a432a03c8a3616c69ba1ff08a46b3eb88
font_01_sfnt_off000116c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 10900 bytes
SHA-256: ff2e3a17100ac0471fb886a636584ba330c93f9f2a293557d558269ef36e297d

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