Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d27262a69dbee5…

MALICIOUS

PDF

79.5 KB Created: 2021-03-18 01:34:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 51107336fe39937ea75cedbcbba7e771 SHA-1: 39cf7a7b6f95e46cf78911a4d11330e7f0bc9551 SHA-256: f9d27262a69dbee5d316de4f170eb2d7633c2ee1a7fe6e1bd9898af125fca3c5
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 ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of an external URI and an SEO redirector link, which is a common lure for phishing campaigns. The embedded URL points to a suspicious domain, likely serving as a landing page for malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=1988+ranger+bass+boat+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457848/normal_6052819fb0e7a.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/cT39ham/encyclopedia_brown_keeps_the_peace.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/hi7wNia/zejexejaseburipufo.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/ctjykAp/alpha_centauri_solar_system_planets.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hePiaWu/ball_obstacle_course_fortnite_code.pdfIn PDF document text
    • http://bukawavado.medianewsonline.com/xodujoboroxok.pdfIn PDF document text
    • http://zafikapasipugog.medianewsonline.com/certificate_of_proficiency_in_english_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_5fe903937701c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_6029a5076cc49.pdfIn PDF document text
    • https://cdn.sqhk.co/todipageb/Biehbk7/32157440502.pdfIn PDF document text
    • http://dodabefokibejo.22web.org/rrb_bangalore_alp_cut_off_2020.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/the_bfg_movie_trailer_2016.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/rudelazifizuvo/74751276300.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/android_auto_bluetooth_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/veneguzi.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/spanish_reading_comprehension_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/free_design_templates_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/bamikunupikamegesamip.pdfIn PDF document text
    • http://wepebodup.rf.gd/rujexexakiwumobale.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/employment_history_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/billions_and_billions_of_demons.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 5516 bytes
SHA-256: 0d67fc4872dca9612ad7787ca82a8ce815cb03bfa6b31d5492f920589a83b752
font_01_sfnt_off00010bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD1 10680 bytes
SHA-256: ca8f06ab9eb1893228654cfac670f31aff9fa273949c460a512ded94203c3454

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