Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9b84cece5abdef…

MALICIOUS

PDF

84.9 KB Created: 2021-03-29 12:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc52a260da3392fedebc0721d53ec24 SHA-1: 3bc0b82a018389fe84c1a380bc030c2061525bb0 SHA-256: dd9b84cece5abdefb7655c741d3f893175d63e8e103dad45048f776e421bdd12
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

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
  • 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://golowaki.ru/award?keyword=buku+bahtsul+masail+pdf
    • https://cdn.sqhk.co/jufenakajo/ig4gghd/8537911210.pdf
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fc609485b081.pdf
    • https://cdn-cms.f-static.net/uploads/4413456/normal_5fe7b79b7a5da.pdf
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5ff277f1d5933.pdf
    • https://static.s123-cdn-static.com/uploads/4443325/normal_5fe5adb2c4bdc.pdf
    • http://povegoj.22web.org/gefaruloxosib.pdf
    • https://bexatebipedo.weebly.com/uploads/1/3/4/6/134631237/kawafatozigoporev.pdf
    • https://cdn.sqhk.co/rogudokives/xdjiNvP/ff14_live_letter_51.pdf
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/tatojiragibat-rovijalepanotob-fukivitelebalav.pdf
    • https://nofemifi.weebly.com/uploads/1/3/2/7/132710694/6629158.pdf
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff0016fe98c4.pdf
    • https://pidesetax.weebly.com/uploads/1/3/0/7/130739971/9032134.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_436e3740603347029d2210c31e7c6eec.pdf?index=true
    • http://xidefuj.epizy.com/vocabulary_from_classical_roots_c_answer_key_lesson_1.pdf
    • https://uploads.strikinglycdn.com/files/bd1f24e4-5988-4a0b-bc22-fae8fc11e1e4/how_to_find_the_measure_of_each_angle_indicated_right_triangle.pdf
    • https://uploads.strikinglycdn.com/files/30561876-b977-4fd8-9f71-e534dab02d65/night_shift_horror_movie_story.pdf
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_f7bc54f06d3e4b158dbd60aab03ee962.pdf?index=true
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_1a71e8921206445e8d36f8d891ece954.pdf?index=true
    • http://dejedizanabi.epizy.com/jipitamubugupebaranem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001234d.bin
7375638c155dd22bc549a1e7c37cd4f20788622ef9907548022d553177b9ac4f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1234D 20040 bytes
font_00_sfnt_off0000ecf9.bin
dea09aa14509ecd74612f19f35e196732f2ef8fc354396c9ac6f3feb587d026b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 5440 bytes
font_01_sfnt_off0000ff56.bin
b370a411b76876e17f448f3d4e376faa7740b02638638d6ef09a5415f40d7c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 10480 bytes

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