Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fb90beb175414d…

MALICIOUS

PDF

75.5 KB Created: 2021-02-24 18:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c1c835e0352257ba85ac40a7ffb4c89e SHA-1: 4d6d3c11355125c2dc138140471a403a7ddef401 SHA-256: 67fb90beb175414da0fed1e91c4127a7715c62f8cfbcb15be358cb8cc146c53b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/strik?utm_term=order+of+sex+and+the+city+episodes+and+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417213/normal_60170a0c0764d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_5fe2e84f20b36.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/gaparubegubeter-guginelarulol-jidebujefumamus-zilolenuloweri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_6014d7ee08f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_5fd317a88b756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_60261598af01d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_603342a65a700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5fe5ecc72c4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5fc888b33468f.pdfIn PDF document text
    • https://balolekuzuwuvaz.weebly.com/uploads/1/3/0/7/130740598/13bd14f4e7d47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobito/john_day_oregon_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/e46_auto_to_manual_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/irs_moving_expense_reimbursement_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/jelelozarix.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 5620 bytes
SHA-256: 3b81dd92484b693c7647a0d9a4ea842a41f5768ff327a1f2a69ef2bc2cefca20
font_01_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 10836 bytes
SHA-256: 5de08f56a05a50a169a1eb821efd5b4caa5a13e28b4898ee863b7d67dd5b972f

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