Malicious PDF — malware analysis report

Static analysis result for SHA-256 9275570e26dd669c…

MALICIOUS

PDF

68.7 KB Created: 2020-11-11 18:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 093bdbe0b8055501175d7ee02d726ab5 SHA-1: 16d1c9fb4591f679976e625e4f3bb4d35c6cd2f8 SHA-256: 9275570e26dd669c53e28beab3ecfa828d1332e2c66dfd6afa90d45aa1656e2b
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://traffnew.ru/aws?utm_term=sportmediaset+formazioni+4+giornata PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/dozoratalimuzilujase.pdfIn PDF document text
    • https://lafibovuvi.weebly.com/uploads/1/3/4/6/134653173/c86c6.pdfIn PDF document text
    • https://zabemukud.weebly.com/uploads/1/3/4/6/134614305/7477222.pdfIn PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/9551407.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/pisedij/72165050601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e8dd68-a3d9-4bd4-9546-d21e0330a955/kudonijokifaneket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0b37c8-c5f6-42ef-84f1-d137bffb77f2/sajofagux.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/dizajej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5e826b-fdd0-4e40-8fd4-52017bd03c50/xepemebagumufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34638636-ebe1-47b6-b7aa-804dd557a922/test_the_scriptures_paul.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/inverted_vs_everted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fd55f9-95be-43cb-9e86-1866656b6d4b/10213159831.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/56186428610.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/ios_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8d140f-e085-4dae-9f41-031a79b436f1/dinosaur_train_einiosaurus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5631ea7d-16a0-48d2-a862-9a5005633036/27560940236.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_off0000cf11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF11 5572 bytes
SHA-256: a352f7f2d3dfe17f06b4d1403a0c1e2d66a02420fa9741c1cf74a7e62cb08556
font_01_sfnt_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 11292 bytes
SHA-256: d16b9a7d2f430e7a9c57184e1d6e924cd148e9ed145ea0b867e6be52647f88fd

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