Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d2a259e8ad2a77…

MALICIOUS

PDF

209.4 KB Created: 2021-03-31 10:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f0b5a5119487f90516d66dd483dfb1e5 SHA-1: d31e4ee119e7012a4aa24974839af3ba1c03a296 SHA-256: 80d2a259e8ad2a77245c935675b8c72d1fc0e16fcd77adf4caa676c9866be6da
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded content, though heavily obfuscated, suggests an attempt to lure the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=clover+dsdt+guide In PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/7619019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_60199fb70830f.pdfIn PDF document text
    • http://fullstacket.online/what_is_canon_ij_scan_utilityfgsvw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421036/normal_6006da8fbb49b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_60186419cc501.pdfIn PDF document text
    • http://wiinorama.space/nyssma_all_state_20201uk42.pdfIn PDF document text
    • http://fitdieta.com/frigidaire_fad704dwd_energy_star_70-pint_dehumidifier_recallxeina.pdfIn PDF document text
    • https://pijetupuz.weebly.com/uploads/1/3/4/3/134351396/6734949.pdfIn PDF document text
    • http://tovelksa.website/science_density_calculations_worksheet_answersvocbj.pdfIn PDF document text
    • https://zizovotitimojuv.weebly.com/uploads/1/3/2/7/132712514/8062824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_6042cdfe8a020.pdfIn PDF document text
    • http://betmoy54.com/first_alert_co614_codesvr3cf.pdfIn PDF document text
    • http://wazadewiketepa.22web.org/train_reservation_form.pdfIn PDF document text
    • http://www.tonymacxIn 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
    • http://nolerepegumadoz.epizy.com/falog.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_64ce9949a7e84b32b14c5cdae4c00503.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_7ef2da057d214c00ad6c18046abddc7c.pdf?index=trueIn PDF document text
    • http://gewevamaki.epizy.com/how_to_win_an_internet_argument.pdfIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_1d8e06155dda4a769818e0a6edd2a078.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_fc1fe0e3067941d3af9e6e538d7c3791.pdf?index=trueIn PDF document text
    • http://vimiromomekex.epizy.com/trevor_noah_born_a_crime_summary_chapter_1.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012da4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12DA4 153368 bytes
SHA-256: fcbb5c57c8a50f6d212c6f1fc30387f85cdaeed81449420f07bb7d5f090108a6
font_01_sfnt_off0002f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16A 4644 bytes
SHA-256: ea6301872bec76b82556b76a7b6f5d5bf883be635e7c26d9503fa633e63deeca
font_02_sfnt_off00030157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30157 11064 bytes
SHA-256: d495390923f459596974710522cb78183337a01183d49a1bf623df6e8c2bec7b
font_03_sfnt_off00032725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32725 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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