Malicious PDF — malware analysis report

Static analysis result for SHA-256 d665d3a47e1b7a35…

MALICIOUS

PDF

94.0 KB Created: 2021-05-28 00:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f003b636015d20170a043578d252a5fb SHA-1: e54800b99a65ec4aec837a52ff89e363e2107764 SHA-256: d665d3a47e1b7a3503f98a84554b24607f8a842d779155bf82af9959a1900361
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to 'seumenha.ru', which is likely a lure for downloading a cracked software loader. The presence of a 'password-protected archive handoff' heuristic suggests the downloaded content is likely encrypted to evade initial scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/strik?utm_term=miracle+thunder_cracked+_loder_2.89%252Bkey_2
    • https://cdn-cms.f-static.net/uploads/4474462/normal_602025db1a6b1.pdf
    • https://cdn-cms.f-static.net/uploads/4424692/normal_601b821e3098c.pdf
    • https://cdn-cms.f-static.net/uploads/4465704/normal_60673117f34ae.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5fe80b04db2be.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_603022522df65.pdf
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/1807254.pdf
    • https://cdn-cms.f-static.net/uploads/4488570/normal_60306d031032b.pdf
    • https://cdn-cms.f-static.net/uploads/4485710/normal_60584ee243ea6.pdf
    • https://cdn-cms.f-static.net/uploads/4494429/normal_604f1ab172392.pdf
    • https://cdn-cms.f-static.net/uploads/4382406/normal_600db5172368a.pdf
    • https://cdn-cms.f-static.net/uploads/4402948/normal_60354150e8710.pdf
    • https://cdn-cms.f-static.net/uploads/4496816/normal_6066a0741c435.pdf
    • https://cdn-cms.f-static.net/uploads/4410016/normal_605e1f9d08c55.pdf
    • https://fozikubovofow.weebly.com/uploads/1/3/4/8/134897471/6936561815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/157ff5d0-3c98-42fb-8cde-b2390904b88d/54648811115.pdf
    • https://uploads.strikinglycdn.com/files/c390265f-f207-43c8-a4da-f35b6e8700d8/pokemon_moon_black_2_download_google_drive.pdf
    • https://uploads.strikinglycdn.com/files/565061b1-fa44-4a3c-9694-e7c5b9895815/nesco_6-quart_roaster_oven_non_stick_-_stainless_steel.pdf
    • https://uploads.strikinglycdn.com/files/1dccab60-af33-42a2-9cbb-85fae61f9116/gtx_660_vs_630.pdf
    • https://uploads.strikinglycdn.com/files/7414fa60-5d23-48c4-94d1-65510a8aef17/qual_o_feriado_de_hoje.pdf
    • https://uploads.strikinglycdn.com/files/04252da7-bb58-49f9-b761-35b21a0f44c0/how_long_to_read_salems_lot.pdf
    • https://uploads.strikinglycdn.com/files/f951cc6c-ef0f-4282-aa1e-4faa14c07c59/neighbourhood_of_a_point_examples.pdf
    • https://uploads.strikinglycdn.com/files/dcd11d10-4612-4082-92f9-603e5909c9d3/tipos_de_fuentes_de_informacion_primarias_secundarias_y_terciarias_ejemplos.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a3c.bin
c1c887263712434765b9fbca903aaeed28bbf1dc4c9f2245afdcf37c21ff1277
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3C 5564 bytes
font_01_sfnt_off00012d40.bin
00158dfe1f17d5cdeaf0eee2143e7381d193569332fb0e013c9f428b54267098
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D40 11064 bytes
font_02_sfnt_off0001534b.bin
ed614ff3ac2e387b3dffe3adc8533a73dd514e171fc201cb60d70b5b5a32e0ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1534B 16196 bytes