Malicious PDF — malware analysis report

Static analysis result for SHA-256 3424b4ecd02f2a14…

MALICIOUS

PDF

89.7 KB Created: 2021-03-24 03:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4158ca33a73dc23fc47b1f6114eb0cab SHA-1: 32070767db2c61b1cbe9ccfdd1ea5840dff48337 SHA-256: 3424b4ecd02f2a146e84bcce3e75e8eb830d69440e51d0132c01137a5dc27974
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being 'https://zajinet.ru/wix?keyword=bluetooth+apk+for+pc', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=bluetooth+apk+for+pc
    • http://fruit-italy.space/how_long_is_malazan_book_of_the_fallenqhosc.pdf
    • http://physcoo.com/ziwakejojufadazerate77tev.pdf
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fdf7237e825f.pdf
    • http://getveran.site/todewumv175.pdf
    • http://womenit.space/genius_song_lyrics_morewwl2o.pdf
    • http://boxijogirexu.medianewsonline.com/pujomofivizigedodunewarir.pdf
    • https://static.s123-cdn-static.com/uploads/4490722/normal_5ff76b17d9be6.pdf
    • https://cdn-cms.f-static.net/uploads/4481825/normal_603e7b7e6febb.pdf
    • http://lezofifividex.scienceontheweb.net/materialismo_dialctico_e_histrico.pdf
    • http://gojavodevagajuw.mygamesonline.org/anlodipino_5_bula.pdf
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd152b59ffdd.pdf
    • https://cdn-cms.f-static.net/uploads/4388283/normal_600cfa88be4a8.pdf
    • http://fashion-deals.xyz/torijepazakevalav9s.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7b48a5b0-2718-46f6-9d88-7fb791389621/trigonometry_revision_sheet.pdf
    • https://uploads.strikinglycdn.com/files/d702aa99-2bef-4375-a1f6-0ab4f77fd747/first_alert_sc7010bv_end_of_life.pdf
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_da437759403b4b30b234cdcfade93589.pdf?index=true
    • https://uploads.strikinglycdn.com/files/55e8b819-7888-44d7-b56e-528b8574815e/siwumunuwumizexazizun.pdf
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_4856e23b52c947539baf0c07cbacb81b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/aec579c0-30e2-44a5-bc28-484bbc459508/64492590968.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_19879a34d1194ae2bb57cc3153860a55.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ab46d50-a550-4b1f-b0bf-194c85ac591e/95471820144.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_off00012e9f.bin
51472731fa7a3631a36296fb852f0ebc11dc8389412c95668cf65774e57c090e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E9F 23236 bytes
font_00_sfnt_off0000f906.bin
6f6abc9012c1757c529e24f85bafad65b675655e1ed9117c63b3a3c0ff3e0c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 5040 bytes
font_01_sfnt_off00010a2b.bin
8c89182b7d58026f63f0e5df65742dc58d6a569688506018e116869ae1bb819b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 10796 bytes

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