Malicious PDF — malware analysis report

Static analysis result for SHA-256 496f0289cb269718…

MALICIOUS

PDF

81.0 KB Created: 2021-04-17 15:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7c3965f4618757fc5ac4b340b15dd24 SHA-1: 768b6e0ec4fcd581bb4b7f7b6e5c2e4dd5ba083b SHA-256: 496f0289cb269718a747fe05fc2e557cca20abbe787ef41b647400dab5b7a701
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'Stanley 600 amp jump starter how to use', suggesting a lure. An external URI, 'https://resalured.ru/strik?utm_term=stanley+600+amp+jump+starter+how+to+use', was extracted, which is likely the malicious payload delivery URL. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=stanley+600+amp+jump+starter+how+to+use
    • https://cdn-cms.f-static.net/uploads/4382003/normal_6059bc0a21e3e.pdf
    • http://vostokzapad.su/mejumev7l4br.pdf
    • https://cdn-cms.f-static.net/uploads/4384472/normal_6021510b1175b.pdf
    • https://static.s123-cdn-static.com/uploads/4492892/normal_60029b6bc827f.pdf
    • http://smartcreditcheck.info/3111905081l3l77.pdf
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fcd629220568.pdf
    • https://cdn-cms.f-static.net/uploads/4385863/normal_605825b69b6c6.pdf
    • http://voirlo.xyz/fabigifogisobowofetajm9wbe.pdf
    • http://milansit.space/72376300328qj2ao.pdf
    • https://cdn-cms.f-static.net/uploads/4390330/normal_6015d39b994fc.pdf
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5fd1c7ac84449.pdf
    • https://cdn-cms.f-static.net/uploads/4492257/normal_604cc13cd40f4.pdf
    • https://cdn-cms.f-static.net/uploads/4484994/normal_6059329ef346f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/221f70df-5cf9-437c-a106-875214db7ee8/53890718450.pdf
    • https://uploads.strikinglycdn.com/files/0a984263-3faa-4350-b94b-375a88a7584b/nanemuvi.pdf
    • https://s3.amazonaws.com/jolituzoji/tmux_mac_cheat_sheet.pdf
    • https://uploads.strikinglycdn.com/files/5df2e684-ce3e-4f36-8251-3562e5f28e8e/bissell_powerforce_compact_turbo_bagless_vacuum_cleaner_lightweight_vacuum.pdf
    • https://s3.amazonaws.com/megodipewukitoj/25784601104.pdf
    • https://s3.amazonaws.com/dopugaxelelema/cat_in_the_hat_meme_template.pdf
    • https://s3.amazonaws.com/jamuluvuvava/chinese_light_novel_download_epub.pdf
    • https://s3.amazonaws.com/sizabo/whatsapp_video_2019_bhojpuri.pdf
    • https://uploads.strikinglycdn.com/files/09fad622-7a9c-45d4-8010-d7a11b7099bc/sibebojuf.pdf
    • https://s3.amazonaws.com/boduxatavepe/how_do_you_cook_a_roast_in_an_electric_skillet.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbfc.bin
c4b3f40721f35e09563430dfe563e24da04a1275d78b0065df01d92ffca49c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 5728 bytes
font_01_sfnt_off00010f61.bin
871f6df84ba479f4a7b182258cb46e972401b7eb46e1b172d4a6fa2eaf497dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 10820 bytes

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