Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d855754211f89c…

MALICIOUS

PDF

67.1 KB Created: 2020-11-27 00:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d24bb05fb1cc111640aa2fe9f21cce33 SHA-1: d6e3acbc6979f21c8ce91e1503d738fa129af986 SHA-256: 99d855754211f89c0ae225fcca2213dbbffe916e98ebf9854e503fa0cb917d57
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-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://traffking.ru/aws?utm_term=to++movie+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5faa16fa334cc.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/zijemowilix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f92031454bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5f9c53f2dc617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5fc0259270093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f83587-25e0-41bf-b425-5b0a67f81b7f/vegas_world_slots_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/tomelirafoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54723359-9e7c-491e-9c7c-e4297bca45ef/1415624164.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/american_horror_story_episode_guide_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f89bf9-cf9e-44e1-991b-42cf75bb87ac/c_how_to_program_10th.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/small_business_email_marketing_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d135e6e-bf3f-4536-afb1-e5f5b66f950d/11032068209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40add9b-fb2f-4e79-a2fd-d036aeffbfcc/68555217203.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/74874416.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/financial_ratios_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea76427-6356-47b5-a48a-98a7ec1d8e22/pubafeg.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_off0000ccb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB4 4532 bytes
SHA-256: 82d6b0bf60d4a392f82d1ca135b8f0780674f0ec3992ec4701f83d3eea68fef9
font_01_sfnt_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 10600 bytes
SHA-256: da8b2b3cde3124d5786a1504ab48787eeec0bf55fcd7db8a266b829c6dba71d2

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