Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00b35151745c346…

MALICIOUS

PDF

74.4 KB Created: 2021-03-01 15:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 934cab5383b017e93da3fd9de420afe5 SHA-1: de6158f74f6da88b581cf30c3cc114a54f0e1b9b SHA-256: f00b35151745c346a66fc60cf5a78fe5168c09781b3092e9c3b23a43492cb352
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of a large number of external links, such as https://maypoin.ru/123?utm_term=teco+fm50+fluxmaster, suggests a phishing or link-farming attack. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://maypoin.ru/123?utm_term=teco+fm50+fluxmaster PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5fe3117537b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_602c8b30ca114.pdfIn PDF document text
    • http://nilitujawi.iblogger.org/jugemeloviwowew.pdfIn PDF document text
    • https://fefedajukuda.weebly.com/uploads/1/3/1/0/131070841/7247552.pdfIn PDF document text
    • http://wunawuwome.22web.org/35283352491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_6028a993a89bd.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/lezazebuvawej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_6008e9b67c305.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/woneketelak/adventure_time_season_1_episode_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/accounting_for_amalgamation_of_companies.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/bancomer_movil_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/business_development_plan_template_example.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/wivaxadeneguwakirabaxenu.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/reflexive_verbs_worksheet_spanish_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/bulgaria_visa_form_india.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B6 5036 bytes
SHA-256: 8dc6ddfe2c90800597b960cd31a19f816d8153ccf33e97ee9a1e1a2e5fe04e40
font_01_sfnt_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 12252 bytes
SHA-256: be0ce375f033ffb17806bb9ff86cf7a3bfb216df0f96d2de9bd4c4af820f4295
font_02_sfnt_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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