Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33e721ea415addc…

MALICIOUS

PDF

75.6 KB Created: 2021-04-06 17:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c920805114474d9003d27c6b89f4dd0 SHA-1: 2d376217ffd22276766da4586de4029941d079a4 SHA-256: a33e721ea415addc3f39321c1df6ce52cc0659fff07b8c8629663a12b5429a36
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the detection suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=troy+bilt+mustang+xp+50+service+manual
    • https://cdn.sqhk.co/nugofonavuf/KBOgebS/swing_shift_calendar.pdf
    • https://cdn.sqhk.co/nomazotesi/cLpieih/agribusiness_management_ebook.pdf
    • http://sevowina.medianewsonline.com/syllogism_examples.pdf
    • https://cdn.sqhk.co/fuvavegipap/gi00qhi/wordpress_hosting_godaddy_coupon.pdf
    • http://laketofetujeso.medianewsonline.com/juxawanur.pdf
    • http://lobafor.mypressonline.com/52343577139.pdf
    • http://waralolojogeta.sportsontheweb.net/22384057851.pdf
    • https://cdn.sqhk.co/nalogigoke/dichfu9/zombie_apocalypse_2021_full_movie.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c80e5eb0-60be-4398-9761-c794c82ab1d5/what_does_the_term_economic_boom_mean.pdf
    • https://uploads.strikinglycdn.com/files/2307415e-e3f8-4840-ac33-a86f5915dd6c/top_notch_fundamentals_b_final_exam.pdf
    • https://s3.amazonaws.com/pilazi/76020457274.pdf
    • https://uploads.strikinglycdn.com/files/671beb81-3593-4580-8bb8-57edc929bbc5/lisevezowideje.pdf
    • https://uploads.strikinglycdn.com/files/5c95bbdf-9f04-4825-9e8b-bac042bc35b2/lepowif.pdf
    • https://uploads.strikinglycdn.com/files/e51de50a-6b4f-427b-8698-39512b648cb3/5495114300.pdf
    • https://uploads.strikinglycdn.com/files/8b65f5e8-bd1b-4c43-9d94-93e0f4e5cf5b/19782709629.pdf
    • https://s3.amazonaws.com/kozibowisenatu/daytona_beach_florida_weather_report.pdf
    • https://s3.amazonaws.com/nisoxow/cabal_2_philippines_free.pdf
    • https://s3.amazonaws.com/zetituri/muvirexamalejew.pdf
    • http://davofunup.onlinewebshop.net/what_is_a_4l80_transmission.pdf
    • https://uploads.strikinglycdn.com/files/cde0efed-f2ad-4620-aab8-c87f389e1eb9/42769131976.pdf
    • https://s3.amazonaws.com/zifilobesumafi/62340981394.pdf
    • http://pezefaxovojole.atwebpages.com/60669985125.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b5.bin
4ef18df7bacaaa04a86dffac9138f4d556d15c882b29d0db8c519e179bd34581		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5840 bytes
font_01_sfnt_off0000fa98.bin
55b772598dac7ac13b3af68b220994712a203c4d06a0a9cda948aa51b2718eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 11332 bytes

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