Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f509a3d6ede4085…

MALICIOUS

PDF

79.2 KB Created: 2021-03-28 22:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf231dc4bc8eba925a914e07105f11d SHA-1: 7d5a4ccce957d5a817d65798f809644c59ffc348 SHA-256: 3f509a3d6ede4085051f9cc5b50e8e4c41b1585a6f0d1ca7996c6ca163573db5
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of embedded URLs and the overall verdict strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/123?utm_term=beneath+sentence+form
    • https://cdn.sqhk.co/dibirolinu/8hjijib/dizefajef.pdf
    • https://cdn.sqhk.co/givesaxi/hjhcjf7/84915792911.pdf
    • https://cdn.sqhk.co/doporaba/aAR5a4V/845030566.pdf
    • https://cdn.sqhk.co/pixazizaze/hdjboJp/tennessee_titans_roster_moves.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c35248e0-e887-4764-aea5-94361e8af71e/goditodigobafelixopekagij.pdf
    • https://s3.amazonaws.com/xurixado/25621409105.pdf
    • https://uploads.strikinglycdn.com/files/1bd14166-df67-4b79-b2dd-630287f1c1e2/dixotivonixijesekonaga.pdf
    • https://s3.amazonaws.com/mawesenasijoser/29093225259.pdf
    • https://uploads.strikinglycdn.com/files/3a21db73-2d9b-4fe9-b3fa-ad6af6037b6b/how_to_install_honeywell_wifi_thermostat_rth6580wf.pdf
    • https://uploads.strikinglycdn.com/files/aa86012d-0cb1-47de-a61d-2a914158670d/cars_coloring_pages_mater.pdf
    • https://s3.amazonaws.com/jukoxisojow/67441940364.pdf
    • https://uploads.strikinglycdn.com/files/eee96ca0-85d4-49cb-8b45-31876b6ee9fe/laletewefiruxa.pdf
    • https://s3.amazonaws.com/fosagoba/consumer_reports_home_insurance_ratings_2017.pdf
    • https://s3.amazonaws.com/pazerogasarinu/grade_7_math_learners_guide.pdf
    • https://uploads.strikinglycdn.com/files/0e5d9424-7b8c-4965-87fe-358bb132867c/bidugomafepugulun.pdf
    • https://uploads.strikinglycdn.com/files/5de711ad-9d9b-40af-8a98-dd840f16aca6/50914750006.pdf
    • https://uploads.strikinglycdn.com/files/c15a517e-6ec9-47cc-b2a7-ee34f20d264d/what_is_2_liters_equal_to.pdf
    • https://s3.amazonaws.com/kevava/fishing_report_west_coast_south_australia.pdf
    • https://s3.amazonaws.com/davolazupivowi/sketchup_download_free_2015.pdf
    • https://s3.amazonaws.com/jivala/tebobuze.pdf
    • https://uploads.strikinglycdn.com/files/be6da933-16bf-43d3-bbf3-c720f06074f2/74018921615.pdf
    • https://s3.amazonaws.com/tuxenipup/dasidonisiwogef.pdf
    • https://uploads.strikinglycdn.com/files/1c2ed501-f132-4064-9c14-de82d4893014/61822289820.pdf
    • https://s3.amazonaws.com/takebemanijewok/bafumunegi.pdf
    • https://s3.amazonaws.com/xefejevife/95407122569.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_off0000f9a1.bin
7c3ca8b50ce8607e3888dfa7559da11f1b2f9a2f143d2a3ec2f09f1260c75205		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 5136 bytes
font_01_sfnt_off00010af2.bin
b40bbeded317c006869088042fe9e7d0eaeda1fdab7e629633c62cc9715de58c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 10636 bytes

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