Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ed656cd88c96a6…

MALICIOUS

PDF

69.3 KB Created: 2021-05-23 03:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9ac8453747a94ecf08a736c814c075f6 SHA-1: ce11ff360af9fd6ac45eea01b93e5c86b7ca53aa SHA-256: 93ed656cd88c96a634301e6ef38db364586c16ef3a644304d93434fec03a68a9
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://dugedepap.ru/strik?utm_term=how+to+set+the+time+on+a+timex+digital+watch PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ffdd4578c0f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_600952963461e.pdfIn PDF document text
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/2777747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369784/normal_5fca81b13381e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488604/normal_605bee6d1a28a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479675/normal_5fdfa9460dba9.pdfIn PDF document text
    • https://lufokozu.weebly.com/uploads/1/3/4/7/134755413/poruma.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/3591292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_6052cd5a6e1fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_604467b530e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_6052fd4cefd29.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/zifilobesumafi/anaconda_3._6_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/what_are_the_major_steps_involved_in_the_capital_budgeting_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027cd30d-ed8e-46c5-a352-557824790299/witcher_3_official_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/autocad_electrical_classes_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a050f8f-f0e6-4756-b930-0031316d855f/beats_solo_2_wireless_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/72778867894.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/glossary_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d52ad27-b54d-4079-9bf5-0695cff2ae72/82110389542.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_off0000d196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD196 5380 bytes
SHA-256: d3738b4fb60b13a3b67b4997aa2d53eedb558b0f0ab307130668b6efc925f1ce
font_01_sfnt_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 10412 bytes
SHA-256: c077215f51d836ad0a86a0c27b9e8ad4b2e07815fa65f839652e4ce7e8072a61

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