Malicious PDF — malware analysis report

Static analysis result for SHA-256 23632af5c78e67e2…

MALICIOUS

PDF

84.1 KB Created: 2021-06-11 03:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a128a0d709159e4295154d301a2650 SHA-1: 6734988a1f1c0e9bab99523cab68bd22fa990eac SHA-256: 23632af5c78e67e23e071f7be5ba32072ed5d2d47170051bf9d61b0e13ee6097
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic or distribute further malicious content. The primary URL, 'https://oniceh.ru/pbw?utm_term=adobe+premiere+pro+wedding+title+project+free+download', is presented as a lure for free software, which is a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/pbw?utm_term=adobe+premiere+pro+wedding+title+project+free+download
    • https://semopadilined.weebly.com/uploads/1/3/4/6/134696525/888283.pdf
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/56328627d3a2.pdf
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/5985251.pdf
    • https://static.s123-cdn-static-d.com/uploads/4459164/normal_60afe2e3b5fa1.pdf
    • https://cdn-cms.f-static.net/uploads/4393359/normal_605978fb6398d.pdf
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/9548119.pdf
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/nifemumigur.pdf
    • https://cdn-cms.f-static.net/uploads/4464077/normal_601d3a287b6e3.pdf
    • https://ginabedo.weebly.com/uploads/1/3/4/0/134017532/mezemuwokumoriw_sopabuxur_lejujum_boripepalul.pdf
    • https://bevarepovorumi.weebly.com/uploads/1/3/2/3/132303359/d80ee9.pdf
    • https://tumirovuwepilu.weebly.com/uploads/1/3/4/6/134603677/fafizuz-kobiwul-xagozolugevo.pdf
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5fc99a8dc270b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c6a68806-aa8a-406b-b034-86ce19b21577/nejig.pdf
    • https://uploads.strikinglycdn.com/files/97de0c70-541e-4e02-8e58-f3ce4e4a973d/58715523073.pdf
    • https://uploads.strikinglycdn.com/files/3a0e4cb7-ae73-438b-b510-7c51d0d79e43/lovapanepojugibafix.pdf
    • https://uploads.strikinglycdn.com/files/3a815cc6-f895-445a-a244-7a7950eb9f53/14661191699.pdf
    • https://uploads.strikinglycdn.com/files/8c43fb9f-59f7-4cae-9cb9-b3629893b697/convertir_pulgadas_a_milimetros_de_mercurio.pdf
    • https://uploads.strikinglycdn.com/files/9a23133c-6fb6-47db-a74c-3531f0be43c6/25293297665.pdf
    • https://uploads.strikinglycdn.com/files/d96f2297-e688-42b7-b2a9-afc047535f03/what_does_e1_mean_on_a_magnavox_heater.pdf
    • https://uploads.strikinglycdn.com/files/7310c6ba-4bcb-4514-b6fc-23ed45867ef6/tcp_ip_stack_vmotion.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_off0000fb41.bin
61ab6cb5d5814fd111bf2a6bfdadffcd17391547a12d703979f1acf7093acfd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 5384 bytes
font_01_sfnt_off00010d84.bin
079927d0f2c482c045cb9512feddc13ca4460b424f892c9e348da3667ef260b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 11996 bytes
font_02_sfnt_off00013472.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13472 4324 bytes

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