Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e81d7b00cf9c37c…

MALICIOUS

PDF

72.9 KB Created: 2020-11-23 11:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 302efb5f617b9b57e208ce7de9c1e5a8 SHA-1: 1194c1fa733193bd8ece9ec05aa1584ee7f1a6ef SHA-256: 1e81d7b00cf9c37c413f686aa6b323174b0e5487be62f7804de879d7e895e183
196 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. It uses a password-protected-archive lure. 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 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffset.ru/strik?utm_term=cain+and+abel+kali PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463533/normal_5fa75b9ded3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_5fa6f44f85ff5.pdfIn PDF document text
    • https://jivoxixipilekok.weebly.com/uploads/1/3/4/8/134885045/8940709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fac0668f1517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5f912996aa9f9.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/9989797.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/c66a6443-c790-4dbd-bcda-079b928e9e67/wukebimejozurozenuran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae7bb35-11fc-4d22-9043-06cc4796b700/jevowirafifojeneto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bb40fe-dc3e-4ba1-8212-0e3a0ddc27a5/xusepidefol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c51c6b8-d3b7-47c4-9530-13295416ce12/push_to_talk_discord_not_working_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/happy_wheel_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ce7173-22e5-4034-8eb2-94c7f60bdd91/vcenter_6._5_appliance.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/1727441910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e929983b-ddda-4f45-8856-c7b99e6b8ae1/ferumazodulejake.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/free_resume_cover_letter_templates_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/32517939342.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AB 4656 bytes
SHA-256: 73de4ab42076947fb7832dda58c093af55f84849a3fa20c3173b632caa6b8ecf
font_01_sfnt_off0000e881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE881 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 10916 bytes
SHA-256: a4e83aa4fc4e7e57e2e79c1f7ce8954374535ba9e693bd55170c3c21fbbc4579

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