Malicious PDF — malware analysis report

Static analysis result for SHA-256 930059f5dc546398…

MALICIOUS

PDF

78.5 KB Created: 2021-03-31 03:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b6357ae81e2c5c59016d4e0bc71a91f SHA-1: ba20835381e1f1301052d43b323e37e209e816d2 SHA-256: 930059f5dc546398a934c8a42af2b5dd7da2002c3a657d7e92903503472f013a
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site for credential harvesting or further malware delivery. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/123?utm_term=best+anime+live+wallpaper+android
    • https://cdn-cms.f-static.net/uploads/4500904/normal_604b5bf3eafad.pdf
    • https://doxemikawapuki.weebly.com/uploads/1/3/4/3/134314999/nagebonawodokil.pdf
    • https://bubipirem.weebly.com/uploads/1/3/6/0/136086135/5680932.pdf
    • https://cdn-cms.f-static.net/uploads/4420239/normal_60505d363d045.pdf
    • https://lexeponin.weebly.com/uploads/1/3/1/8/131856664/b1fee340094b.pdf
    • https://static.s123-cdn-static.com/uploads/4493905/normal_5fc6c896ab328.pdf
    • http://worabipupe.mypressonline.com/american_red_cross_jobs_buffalo_ny.pdf
    • http://fezatubiwe.getenjoyment.net/what_time_is_usps_open_till_on_saturday.pdf
    • https://cdn-cms.f-static.net/uploads/4463279/normal_6055be1254836.pdf
    • https://cdn-cms.f-static.net/uploads/4474218/normal_60607afa8ce18.pdf
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/2116520.pdf
    • https://nelejezubifub.weebly.com/uploads/1/3/1/4/131406077/45e3b57567d4.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://joberemig.atwebpages.com/82479663958.pdf
    • https://s3.amazonaws.com/kufazete/dymo_labelwriter_450_turbo_printing_error.pdf
    • https://s3.amazonaws.com/divelatoxa/rerowerasujinetamafo.pdf
    • https://s3.amazonaws.com/mejigavukolu/sigmund_freud_definition_ap_psychology.pdf
    • https://s3.amazonaws.com/rupatojuko/iphone_6_plus_clear_case_template.pdf
    • https://s3.amazonaws.com/nitizobuv/16805071837.pdf
    • https://s3.amazonaws.com/rizezobabub/kijafifemijuretow.pdf
    • https://uploads.strikinglycdn.com/files/cbd3c98f-a13a-42f6-bc9b-f4c1f8e5fa0e/samsung_galaxy_s9_plus_used_price_in_pakistan.pdf
    • https://uploads.strikinglycdn.com/files/307aeeb2-1168-40c4-89b5-62bc62671463/48800407484.pdf
    • https://s3.amazonaws.com/sajatesawodiji/pesumenogupujekogiwasoj.pdf
    • http://jokosen.atwebpages.com/how_to_adjust_norcold_fridge_temp.pdf
    • https://uploads.strikinglycdn.com/files/5c7d2121-bfef-4443-bbff-1c7176eae2fe/advanced_violin_scales.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ee78.bin
36bb407914789a482d7c45932d03a21ef49e8b1cd74b4515fba0cbef6ffc123d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEE78 9692 bytes
font_00_sfnt_off0000dc7a.bin
190b1d35453061b8b501f1a9d1ecbce34853ce554e17ad34296fc6ea5bb0f2a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7A 5304 bytes
font_02_sfnt_off0001094e.bin
e32173ebcdac1be42a4510122556d4d444c9cc6b6f97bfa72be9c584e144a55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 10160 bytes

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