Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed981fe3dbfd02e9…

MALICIOUS

PDF

88.8 KB Created: 2020-11-19 22:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 851b6d8a0161654ac513146f38e41f26 SHA-1: dcba5e7cfffe44375d1d61b4dad4697344295ce6 SHA-256: ed981fe3dbfd02e992b7d555dd9e3e311faaee58a3977e55b8db367744f62022
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=ge+hybrid+dishwasher+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461770/normal_5fb0339636e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fb4f03178860.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/5552995.pdfIn PDF document text
    • https://buwabasowo.weebly.com/uploads/1/3/4/3/134353515/5239cdf0fd95d4.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/lebaxa/the_type_of_sugar_that_starts_the_process_of_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0c7dbe-a981-49e4-96b7-b1af8b568cff/4103350783.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/20566155363.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/padi_emergency_first_response_knowledge_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/hito_alarm_clock_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7fc4f4-462a-4a6c-a99b-f32616d775ea/49188782077.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/cite_mla_purdue_owl.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/70595391316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b177c3-457e-434f-96f2-1b907ee5f4de/11481872151.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/12269835492.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/december_9_1977.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/fiwugalixuxodirevo.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/datevanozowaposufadino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6240f6e9-fda9-457e-a538-5f814b52c255/93316421489.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 5304 bytes
SHA-256: 175f1760a01473e94951b1f8511f727da796a5921a086f0eb6f4f24484827dbd
font_01_sfnt_off00011815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 10244 bytes
SHA-256: 56683b085ca77668105678b9b0ae81118671553479bf1702f568212be48783b1
font_02_sfnt_off00013b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B52 17600 bytes
SHA-256: e9cb76d9c4b06e0af0fdf325c99f6d63ea5aecd895a48e6364aef8a5e485b9ac

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