Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9a704041fd7438…

MALICIOUS

PDF

79.4 KB Created: 2021-02-28 18:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c093942e04ee0ce4a1377e79a3aa25ec SHA-1: 75d57a58d70100efa962e73efc3850d286f13b4d SHA-256: db9a704041fd7438961a25c3fe60a98ce8980d146cacdd25e2493689092a9c12
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'xajibur.ru' and a heuristic for a download button lure suggests the document is designed to trick users into downloading a payload. The document body, though heavily obfuscated, contains text related to 'First aid log book download', reinforcing the lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/strik?utm_term=first+aid+log+book+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd1d4056e953.pdfIn PDF document text
    • http://lupaper.22web.org/parkdean_cherry_tree_entertainment_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_601f2e2808948.pdfIn PDF document text
    • http://peskomment.ru/67978251711widgb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_6016589b963c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501996/normal_600e612e6dcdd.pdfIn PDF document text
    • http://zigodijod.iblogger.org/69471198962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466680/normal_5fc711914dc54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_6034ce9e1756d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5fdb54f02cccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_6013f4e921d8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fc899249491f.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
    • http://faloboxodutak.epizy.com/71851872066.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/pokemon_black_and_white_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/when_will_dmv_open_for_drivers_test.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/pexokav.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/bakonip.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/93315275253.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/online_bus_ticket_booking_app.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_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 4916 bytes
SHA-256: 60e18e47ff077b138d128cd7f99ac24f851a910a6e506a69ee8d85abf23e699f
font_01_sfnt_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 11696 bytes
SHA-256: f15cc908119509396dc79442cad5e1637ad2fc92ae0aa215b27c2f5a02da7e2f
font_02_sfnt_off00012267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12267 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.