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) First seen: 2026-06-04
MD5: 70a6d960df57e8cacc2883562485a9ad SHA-1: b66a0a5496dce7b2b72274e587db8b7995d29326 SHA-256: 3ca1aa4c880a293c1717022010f851628b61bb360a2adccdb5bbdefa0a3723f1
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a high number of external links, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains keywords related to 'air conditioning system' and application metadata, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 PDF link annotation
    • http://betmoy57.com/45167838564aq3io.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/dumilodadezi.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/dark_glass_alliance_book.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/tasabaxak.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/siemens_hearing_aid_bluetooth_transmitter.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/soduviforegedobu.pdfIn PDF document text
    • http://smcjd.com/jaxopafapedafabivuyrwrv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_d1088da9a87f4a92a2e93071b0ee5e2b.pdf?index=trueIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_a1ed3c229d944a6c85800bc74e08a8e7.pdf?index=trueIn PDF document text
    • http://wojibikifi.myartsonline.com/nufenebulidugot.pdfIn PDF document text
    • http://nudoritane.atwebpages.com/krishna_series_on_analytical_solid_geometry.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_34ff3e42e15749c8a06a50a6310f2343.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/471e0fa7-0bae-4ef9-bb26-02a16034e506/what_is_the_main_theme_of_the_story_araby.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_7a0b6468fd9f49e8bb67072a7e661edf.pdf?index=trueIn PDF document text
    • http://zagupijalixi.myartsonline.com/lusaripujugibobaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b728ca41-eaf9-4ff1-8140-4c4be2f8a9ac/modelo_atomico_de_sommerfeld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f49bcb7-a80e-4190-83a7-0e24b01f6d68/mksap_17_download.pdfIn PDF document text
    • http://xoxekojut.onlinewebshop.net/calendario_liturgico_2020_peru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63486d0-383d-418a-b251-85c8834606e7/how_to_prepare_for_the_pe_exam.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_e7db97e51602406da3f094a47b38ba04.pdf?index=trueIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_c256240db1224dd5b8b8f8e73bcee683.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_96b96e652b26462aba5a2e603bca9c91.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 5528 bytes
SHA-256: f1bcbaa58de37868951246f562b619940869705eb537f22ca8681a0069d06303
font_01_sfnt_off000109e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 10616 bytes
SHA-256: 01883f9f474fcb84f1be63eb537e7b48719aa61041b3124397d04f6325afc689
font_02_sfnt_off00012e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333