Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca1aa4c880a293c…

MALICIOUS

PDF

82.4 KB Created: 2021-03-21 21:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70a6d960df57e8cacc2883562485a9ad SHA-1: b66a0a5496dce7b2b72274e587db8b7995d29326 SHA-256: 3ca1aa4c880a293c1717022010f851628b61bb360a2adccdb5bbdefa0a3723f1
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. The embedded URL and document body suggest a phishing lure related to 'summer air conditioning system pdf'. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=summer+air+conditioning+system+pdf
    • http://betmoy57.com/45167838564aq3io.pdf
    • http://nokojatagi.mywebcommunity.org/dumilodadezi.pdf
    • http://jawazapefaxuzit.mywebcommunity.org/dark_glass_alliance_book.pdf
    • http://wizapivizesib.mygamesonline.org/tasabaxak.pdf
    • http://telovajov.medianewsonline.com/siemens_hearing_aid_bluetooth_transmitter.pdf
    • http://kevifiregerufug.scienceontheweb.net/soduviforegedobu.pdf
    • http://smcjd.com/jaxopafapedafabivuyrwrv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_d1088da9a87f4a92a2e93071b0ee5e2b.pdf?index=true
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_a1ed3c229d944a6c85800bc74e08a8e7.pdf?index=true
    • http://wojibikifi.myartsonline.com/nufenebulidugot.pdf
    • http://nudoritane.atwebpages.com/krishna_series_on_analytical_solid_geometry.pdf
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_34ff3e42e15749c8a06a50a6310f2343.pdf?index=true
    • https://uploads.strikinglycdn.com/files/471e0fa7-0bae-4ef9-bb26-02a16034e506/what_is_the_main_theme_of_the_story_araby.pdf
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_7a0b6468fd9f49e8bb67072a7e661edf.pdf?index=true
    • http://zagupijalixi.myartsonline.com/lusaripujugibobaba.pdf
    • https://uploads.strikinglycdn.com/files/b728ca41-eaf9-4ff1-8140-4c4be2f8a9ac/modelo_atomico_de_sommerfeld.pdf
    • https://uploads.strikinglycdn.com/files/6f49bcb7-a80e-4190-83a7-0e24b01f6d68/mksap_17_download.pdf
    • http://xoxekojut.onlinewebshop.net/calendario_liturgico_2020_peru.pdf
    • https://uploads.strikinglycdn.com/files/b63486d0-383d-418a-b251-85c8834606e7/how_to_prepare_for_the_pe_exam.pdf
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_e7db97e51602406da3f094a47b38ba04.pdf?index=true
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_c256240db1224dd5b8b8f8e73bcee683.pdf?index=true
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_96b96e652b26462aba5a2e603bca9c91.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f731.bin
f1bcbaa58de37868951246f562b619940869705eb537f22ca8681a0069d06303		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 5528 bytes
font_01_sfnt_off000109e3.bin
01883f9f474fcb84f1be63eb537e7b48719aa61041b3124397d04f6325afc689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 10616 bytes
font_02_sfnt_off00012e1b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1B 4324 bytes

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