Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f5d74fdaac2f8a…

MALICIOUS

PDF

85.5 KB Created: 2021-04-03 08:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9766c0cde9987cb64af10c7cf0026a2 SHA-1: d32e1f7d935e486386cd94193e751d0c35851766 SHA-256: c6f5d74fdaac2f8ad03144516d7c91dd6daad8aaca9edb75dbc4f77f27d90fde
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://lozipotod.ru/123?utm_term=rachmaninoff+concerto+no+2+sheet+music, which is likely used to distribute further malicious content or phish credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://lozipotod.ru/123?utm_term=rachmaninoff+concerto+no+2+sheet+music
    • https://gokidobizivoji.weebly.com/uploads/1/3/4/4/134495246/897684.pdf
    • https://vinokiwofexuge.weebly.com/uploads/1/3/6/0/136095936/6136151.pdf
    • http://pobunav.sportsontheweb.net/gasizafereb.pdf
    • http://jelesanu.iblogger.org/niduxukowamuzaka.pdf
    • http://tuvivukaroj.mygamesonline.org/62889372454.pdf
    • http://mukinumatonewo.getenjoyment.net/casio_illuminator_world_time_watch_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_1018f1b384314897a3f2c8919e2c5534.pdf?index=true
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_46e9c804c4fe43199e70c55d02d3d222.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2f75ad8a-5886-4006-9467-209409484127/5020996886.pdf
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_b148400b68c842ad9dd5eb6826507a00.pdf?index=true
    • http://rorazizaxaf.atwebpages.com/99704473346.pdf
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_3674b22402a4477bbf2981e6b6e0871c.pdf?index=true
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_9ca4e04f4a5545a4bc582fb9302ca24f.pdf?index=true
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_18a4820738db4cd58b7588131f88528f.pdf?index=true
    • http://fatijilipoto.epizy.com/fafinujilakabiwugesuvepa.pdf
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_4d8e0da7539945e2a1547ead7417395c.pdf?index=true
    • http://jiwerefupuz.epizy.com/wajofofa.pdf
    • https://uploads.strikinglycdn.com/files/620b13df-774b-4026-b12a-411b118982ca/36956406417.pdf
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_89af46568e924963b8201887f10bed58.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9d9813a5-aaec-4b79-a369-9f2d0bc02c9b/is_inquisitormaster_an_online_dater.pdf
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_c9655c3f0c084eeb8b24b3ed0884adcf.pdf?index=true
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_52751317a01b48958abc6e64586356af.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b4.bin
4b8c2b927b8a85336dfa1a11aa1b9f2e471a9f7a65b47c7546ef3b7b3ab5f0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 5108 bytes
font_01_sfnt_off0000fae8.bin
dbf225e1dc08de11b579ee878be28c88460e6c59d23d81761f76f578204ca1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE8 11572 bytes
font_02_sfnt_off000122ce.bin
99308d2943c7867383f38f1c211846cc6735cce0880ded375eef66ea4f3e2d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122CE 16184 bytes
font_03_sfnt_off0001380e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1380E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.