Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e17757596e2bdfe…

MALICIOUS

PDF

74.8 KB Created: 2021-04-03 04:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dac12d896c62ba8f1e72e2faea1311c6 SHA-1: cc4051ccf143ea06c888a6991344403e9b085966 SHA-256: 7e17757596e2bdfe62f4bc523fb0d8cd79b712d1bed49987dae252169ea92788
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a specific ClamAV detection for Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, many pointing to disposable hosting domains, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the phishing/trojan detection points to a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/123?utm_term=timex+nature+sounds+alarm+clock+radio+manual PDF link annotation
    • http://ziviludemedo.iblogger.org/tencel_lyocell_sheets_bed_bath_and_beyond.pdfIn PDF document text
    • http://rmk4sale.xyz/50190173935famm2.pdfIn PDF document text
    • http://midosiw.22web.org/medical_tourism_marketing.pdfIn PDF document text
    • http://shoop-fp.ru/getowasupidujijoganv7te.pdfIn PDF document text
    • http://shop-you.xyz/telufcplnc.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/blanching_of_fruits_and_vegetablesgkx0g.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://uploads.strikinglycdn.com/files/33005d2e-fa47-49fe-ad3a-2ed61f57a46d/how_to_use_time_wisely_in_lockdown.pdfIn PDF document text
    • http://zasufogokalo.rf.gd/beautiful_intermediate_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747befb8-1c66-45be-bfd3-d021defbfa6e/atlas_copco_compressor_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6851892-0ea4-4df3-851c-d0905bef5276/how_to_reset_toshiba_fire_tv_without_remote.pdfIn PDF document text
    • http://kesesisad.rf.gd/majemexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45efa32-3d6e-4d21-9323-98c1edcf42ed/zaxufakefoxekogofikupuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c7f7e3-df3e-4cbd-b0d8-78dc28754e3f/11536405339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46b4122-7d31-4b24-a6d6-9f081b152d32/rulovukefuri.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/bubble_shooter_5_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a31f5b-d65f-43f3-84f8-87c091ae07ff/iris_blue_dubai_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/57045694694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ef0102-e71f-4a63-b699-c8aa3a9cdcf8/bosch_glm400cl_home_depot.pdfIn PDF document text
    • http://laganomezavarof.epizy.com/64047799090.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 5048 bytes
SHA-256: 1d81010550cb58806c9c180be41ddb2613c77ced92ea8938c7c6bd63d276b5f0
font_01_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 10516 bytes
SHA-256: 44076dadc9a8dab4ff52f2d7caa33696cb8e05851a83f8837bf8811a8bbe9b7a
font_02_sfnt_off00010f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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