Malicious PDF — malware analysis report

Static analysis result for SHA-256 83181628b4b115cb…

MALICIOUS

PDF

78.7 KB Created: 2021-03-13 21:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d7f01b2df156d23d6cf91bb33f0f84 SHA-1: 5deac60c0b33a0f1ac60609626a141e09e7a5bcd SHA-256: 83181628b4b115cbf680a34a0c79a16ed6ea1c773272032c799e6125ae565d1c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=selena+gomez+encino+address
    • https://cdn.sqhk.co/jutafegobexe/gibq0he/believer_song_tamil_masstamilan.pdf
    • http://nigavereke.mygamesonline.org/zogogu.pdf
    • https://cdn.sqhk.co/tamaladafa/thaYlBR/amazon_music_unlimited_echo_auto.pdf
    • https://cdn-cms.f-static.net/uploads/4461751/normal_603905add6f9e.pdf
    • https://cdn-cms.f-static.net/uploads/4474170/normal_6047acb3683df.pdf
    • https://cdn-cms.f-static.net/uploads/4471690/normal_60186adf928e0.pdf
    • https://cdn.sqhk.co/dutudovajud/niegchd/ps4_remote_play_apk_pc.pdf
    • https://cdn.sqhk.co/puxolika/cIyujed/universe_pandemic_2_guide.pdf
    • http://derifupiwa.mypressonline.com/also_sprach_zarathustra_german.pdf
    • http://zozamowewideno.mypressonline.com/toxofexunojufubijabuv.pdf
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fc5f78562f55.pdf
    • https://cdn.sqhk.co/fexilejedit/vpjgP3h/jirexikuvozigeziru.pdf
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5fe1ced6a8c37.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_15ec359c1d6f434687e49647d44dc3e7.pdf?index=true
    • http://vejegaba.atwebpages.com/whirlpool_cabrio_dryer_manual.pdf
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_1a6f9f4a59c44295bd1d65219377aa61.pdf?index=true
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_64d821014c434e7c864b476e8883010d.pdf?index=true
    • https://s3.amazonaws.com/jadere/76542005292.pdf
    • https://89e1056b-8c01-44a4-bea5-a80a497d444f.filesusr.com/ugd/6db6f7_ce46a55e13d74757b03b60cf513cce1b.pdf?index=true
    • https://s3.amazonaws.com/tarizirefevifab/octavius_caesar_character_traits.pdf
    • https://s3.amazonaws.com/gavapozalilup/beowulf_and_grendel_story.pdf
    • http://wavexijazibivat.myartsonline.com/a_dozen_a_day_preparatory_book.pdf
    • https://s3.amazonaws.com/timeziso/98815112808.pdf
    • https://uploads.strikinglycdn.com/files/c91ff52b-8c35-4c5e-b03a-15faac8427a5/chess_openings_for_beginners_book.pdf
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_db2cd9e0aa9b4e87aa029dbe9dba18de.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a3a0728d-f43d-46eb-a20f-2021b24b0ddc/96587339537.pdf
    • https://uploads.strikinglycdn.com/files/3558ed2e-7885-45ec-86d9-30ea2a61a763/71680298949.pdf
    • https://s3.amazonaws.com/tipikaxe/68226384255.pdf
    • https://uploads.strikinglycdn.com/files/a0ff2af2-7d2f-483c-82e2-f14abea45817/59551630753.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_off0000f363.bin
06d407c38b9c9562a6df9d8ce10e28745bf98d2aa307842eb7c069781f2234e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 5412 bytes
font_01_sfnt_off000105b9.bin
d488e8ff964b937aae6337867c51918ef7412614539c20784c983e9699cdf0b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B9 11716 bytes

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