Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ffe8d21250d8b0…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 10:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8235431f094076a56a4924bf7d0c0fb9 SHA-1: 9396803907eca9a28bc42ddbbeb7d9ec1a0f60fe SHA-256: 49ffe8d21250d8b032a7486bb29b5b147e7aa1df90f600f483b13564a43f5b92
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics further supports its role as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=primeos+android+x86+nougat+for+pc%252F+laptop PDF link annotation
    • http://dadevizevarek.scienceontheweb.net/pdf_to_word_free_mac_download.pdfIn PDF document text
    • https://tovunebutulewe.weebly.com/uploads/1/3/1/8/131871744/kaluripomet_faxaralaxifexew.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/56967055003.pdfIn PDF document text
    • http://ganolegelaso.22web.org/power_pressure_cooker_xl_rice_instructions.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/cnb_magisterio_de_educacin_infantil_bilinge_intercultural.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/1686846.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/moxenuwukepekutur.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/xNhcjgZ/93054968656.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/qPaT2hj/72316081787.pdfIn PDF document text
    • https://cdn.sqhk.co/pikikunifav/didJjii/94434091598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c629428-6c55-4dde-9065-0e49127f1f1f/88634168879.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/72185945235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2f8a6e-3428-4fa9-906e-986cd024a611/51158989535.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/zikit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298ab1f1-2dcd-4918-b4dd-f8eba3a8466a/how_to_clean_a_saltwater_chlorinator_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/what_is_the_difference_between_active_and_passive_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/sususo.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/comcast_remote_codes_for_lg_smart_tv.pdfIn PDF document text
    • http://dodavofonov.rf.gd/zajukituf.pdfIn PDF document text
    • http://zozasozam.epizy.com/kagulewabususomobosefox.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 5928 bytes
SHA-256: 3771e22efb962efb5e681391f00e690a4dbefaf169376ef38da453d1b4bbe899
font_01_sfnt_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 10652 bytes
SHA-256: 69703b5ca8fd31618926446d6ab5f5912b1fbac50993e9f22050b552fb3ce9d9

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