Malicious PDF — malware analysis report

Static analysis result for SHA-256 3068e396e0744e9a…

MALICIOUS

PDF

67.6 KB Created: 2021-03-10 00:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 392e13af19d930b819741677c368ec0c SHA-1: 2c3a54f9867cfae5f44e2563fb8e2ff9a2b0cd75 SHA-256: 3068e396e0744e9a35f149d61ac8f2e9ee59b5da5d3a1ebb78a5457879761026
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and is flagged by a machine learning classifier and ClamAV as malicious. The embedded content, though heavily obfuscated, suggests a lure related to 'Fujitsu mini split installation manual' which points to a phishing attempt. The primary malicious IOC is the external URL used in the lure.

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://resalured.ru/wix?keyword=fujitsu+mini+split+installation+manual
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/pamimazigebozi-fadab-jovubi.pdf
    • http://uuuuull.space/dragon_ball_z_bojack_unbound0ix38.pdf
    • https://cdn.sqhk.co/potebuso/heuXcVg/my_lips_are_always_dry_no_matter_what.pdf
    • https://cdn.sqhk.co/ketusugedi/hshbJ6K/22335381626.pdf
    • http://martakkord.ru/the_monkeys_paw_middle_schooljlvsz.pdf
    • https://cdn.sqhk.co/vikojovowoso/ibijjJV/nojufuzigu.pdf
    • http://rbqjkwklnd.xyz/makuziwirumufogegcmo5.pdf
    • https://cdn.sqhk.co/ruwiketi/SfJnhei/48536968244.pdf
    • http://vovpomnim.ru/rosedapuj5kl8x.pdf
    • https://cdn.sqhk.co/jonimaze/jfjhGjb/new_silver_cloud_inn_tacoma.pdf
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/2704474.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/843b526c-ecec-4f35-a5ff-13b90c1f5db2/wopovasurekofileluzaxaku.pdf
    • https://uploads.strikinglycdn.com/files/89a8c294-1604-4689-929b-544c52ec32fb/31374185738.pdf
    • https://s3.amazonaws.com/mujesogi/how_to_use_table_driven_pattern_in_solidworks.pdf
    • https://s3.amazonaws.com/dazinibonofobi/promethean_interactive_whiteboard_price.pdf
    • https://uploads.strikinglycdn.com/files/7631930a-738f-4171-b753-66593a832923/29434491189.pdf
    • https://uploads.strikinglycdn.com/files/0bf8a7e0-7f61-476b-a955-af4d7a685102/when_does_the_war_arc_start_in_naruto_shippuden.pdf
    • https://s3.amazonaws.com/legesiliv/i-_design_engineering_solutions_ltd._annual_report.pdf
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_6f8c9a3fcfd441c383b1d2d0199db975.pdf?index=true
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_53d7e095bd6144d4ae2a944ed8f5df44.pdf?index=true
    • https://s3.amazonaws.com/luropiw/chicago_fire_news_reporter.pdf
    • https://s3.amazonaws.com/liluvad/vertigo_1958_full_movie_free.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_off0000cf8d.bin
443729220ffe5eeb9be7081f4d8fc93c815bc2229cf331f00fabe78f7ebecd93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8D 4900 bytes
font_01_sfnt_off0000e028.bin
10baa61eb67d823fda6d25472a962df70657ba8581b7c0509c91aaf6e347cecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 9644 bytes

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