Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaeb953c767b2ab7…

MALICIOUS

PDF

81.0 KB Created: 2021-03-19 08:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 750b7b10c48f574146247c001d70f3d1 SHA-1: 26b2d9a9edd9ad015e0023deb4bfd8627232160e SHA-256: aaeb953c767b2ab74fab6c98e391005b9e2fb2eafd8b80946f87d7239918eecf
194 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of a 'Download Now' lure further supports this. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=download+murottal+quran+30+juz+lengkap PDF link annotation
    • https://nepigisebax.weebly.com/uploads/1/3/4/4/134477897/8188936.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/6706765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_601cf82090581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fcd093a6350c.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/pojatepuvavoj-woxitisefunulu-josed-judamexufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366628/normal_60036daa59ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fd7af91a70df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450638/normal_6052b7ae2d391.pdfIn PDF document text
    • https://vemegerefawobe.weebly.com/uploads/1/3/2/6/132682093/5399923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_600254a5976fe.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/8363d8fec6033e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5fe5106ba1aae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunijakokusageg.epizy.com/net_framework_4._0_for_pc.pdfIn PDF document text
    • http://setiwol.epizy.com/cch_chuyn_file_nh_sang_word.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_d7d3ed53e1e44b0786398822be902094.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_32b1529c38a24a2b8a2639276fb12d9e.pdf?index=trueIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_8c9dbe64d1ed433ca670957757df74a3.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_5e3a4faf9cc3436094b77c2899d6bfcc.pdf?index=trueIn PDF document text
    • http://kesitebogi.epizy.com/tabutizukeduzademadosili.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_e46c02a594e74a2180a029742af3de54.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 5816 bytes
SHA-256: b7c1ab3c9aebab4bea89d9641e732a5e657ac94ccd0b3c26cc62861a94867b29
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 12016 bytes
SHA-256: 0c00b10eac781714843311b33929a14132da4eb33198706f8a0d6c8a0760bcf1