Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38dce3f76305fd5…

MALICIOUS

PDF

70.5 KB Created: 2020-11-20 03:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 11e159e5623ec791bb818eba5e21126f SHA-1: c0a0e975fb3fcefcbc4ee533ef91a422e5f9c057 SHA-256: f38dce3f76305fd5c5411f0c5f3fb3c88e5e86344d8f547bedc2c5018d73d585
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier also flagged the PDF with a high probability of being malicious. Although the document body is heavily obfuscated, the presence of a malicious URL suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=john+deere+4100+wiring+schematic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f917d6ce9089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f9212648d291.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/5af46ffd-ce30-47a2-8139-6a740f668a6f/xukojujibojipujifaz.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/12959606470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32167641-c32f-4716-87f5-659a9994d8cb/xobona.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/caustic_soda_in_powder_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7a701f-1749-4e5b-a83a-d2b3e70e8294/84860196115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab14b2e8-ae5f-40a8-ad67-4e7c668fba77/diy_photo_album_binder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b01d85-982d-4a8b-aba3-af9f96303b44/girls_last_tour_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef9448d-3a0b-4759-bce3-1b6bd4a00df6/vuxisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d79a3c8-8f80-415b-80f4-a62bd5e7f117/illusion_games_play_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c321464b-4db2-4991-9799-86ba274c6d8d/jesozezepemasekurakal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d56207-2281-47dd-96e8-ee80267bb1a8/firex_1240c_smoke_alarm_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b4af04-1666-49fb-9a56-2198f1f5ff50/fekupatuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a938f4-4918-4b31-9c49-822d8354c335/pabukimur.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_off0000c921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC921 5472 bytes
SHA-256: f11e2b1cf31da97388728b87da1a2662fa28c0d3e687dc638b8f77d4217c50bd
font_01_sfnt_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 10356 bytes
SHA-256: 666518fa8b7aa772c984162bfb3449838a1225b64fab782e1da97c86b032710e
font_02_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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