Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3b770ed1cea5a1…

MALICIOUS

PDF

73.7 KB Created: 2021-03-19 21:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b17f414fe4fa67c50e6ed3e7244cd818 SHA-1: a94e79e3db3645b097f279b8af601b1aa085347c SHA-256: 0c3b770ed1cea5a1d02c2217dba2576503cb846586716dc5bbb25294e0f1ca17
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 ML classifiers indicated a high probability of maliciousness. It contains an embedded URI pointing to a URL that appears to be a search result for a game download, likely a lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site for further compromise.

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://vilenefex.ru/wix?keyword=minecraft+pe+0.5+0+apk+download
    • http://mimisijuz.mypressonline.com/diode_digital_logic_gates.pdf
    • http://fruktovik.com/coshh_data_sheets_for_aldi_productsmq9l6.pdf
    • https://cdn-cms.f-static.net/uploads/4475217/normal_5fda4d0a2870d.pdf
    • http://the-job.ru/37215235086211jg.pdf
    • http://lerimofo.mywebcommunity.org/59085870890.pdf
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5ff81fdb9e50d.pdf
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/kozufobuxanodis_satererekududem_sudegi.pdf
    • https://cdn.sqhk.co/moserusoba/fghijiT/balloon_ideas_for_baby_shower.pdf
    • https://static.s123-cdn-static.com/uploads/4413713/normal_5ff9e15986460.pdf
    • https://dagagiketilijo.weebly.com/uploads/1/3/4/3/134312633/vemalinizazujozef.pdf
    • https://cdn.sqhk.co/wusirilunoko/cKSieus/desk_calendar_template_vector.pdf
    • http://sosuziba.mypressonline.com/30886408404.pdf
    • http://axecheat1.xyz/blue_cross_blue_shield_login_floridauu5qv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3662aa73-1f1f-4f53-9285-4e2281c44cdc/57094914274.pdf
    • https://uploads.strikinglycdn.com/files/428f0388-07ee-467b-adb7-b33804ded98c/stephen_hawking_film_trailer_deutsch.pdf
    • http://valupakukav.myartsonline.com/ratojej.pdf
    • https://uploads.strikinglycdn.com/files/4faa5848-309e-4863-acd3-520690a6ad51/luces_de_bohemia_esperpento.pdf
    • https://uploads.strikinglycdn.com/files/e2d83a3e-cfb1-4741-ad2a-9138d763800e/97901776397.pdf
    • https://uploads.strikinglycdn.com/files/f9a6d967-5fc5-4bae-bf37-0e98d508025f/mevunuwaku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfd2.bin
00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD2 2960 bytes
font_01_sfnt_off0000da41.bin
6eb3b25a00f1eaf9750f583abc0f801c696ece4dd9be87fe20911ee5004eb4f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 5432 bytes
font_02_sfnt_off0000ecf5.bin
04d5942b2dbd08dfab85a660626178b5b350caca592e1f6a3869d7921355575b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 14988 bytes

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