Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5ffcae53244277…

MALICIOUS

PDF

70.1 KB Created: 2021-03-20 08:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d1efa0523cf04417b1cd3aaa70a4335 SHA-1: acac03c72690294ffc49b4d2150c7132e678b1e6 SHA-256: ed5ffcae532442772670c63433925732c4eec4e0dfb7c266e5e919d0e9a2054d
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=5e+player%2527s+handbook+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd60c9024671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_601bcdd199720.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5ffde312a12bc.pdfIn PDF document text
    • https://fibarivinudew.weebly.com/uploads/1/3/5/3/135387866/mutela.pdfIn PDF document text
    • https://zazetafulunemu.weebly.com/uploads/1/3/4/5/134599809/e1cf8278ca4f31.pdfIn PDF document text
    • https://morinuzarisifuf.weebly.com/uploads/1/3/4/2/134234593/2813593.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/2749001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_601cf7d35d6e5.pdfIn PDF document text
    • https://tefovaxosu.weebly.com/uploads/1/3/1/1/131163863/959b57a249.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/06f000e7-76bd-4653-a202-2d4b7e0587c7/keto_dessert_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/math_worksheets_two_digit_addition_without_regrouping.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/60121691583.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/jelawugolebejo.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/fopamanelinebagogozas.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_7230a4a1ed664c098babf8528465f15f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7ab6f4-802a-4cec-bb66-f8b5e3b823a2/zifesaputipulefox.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_138300c8ed5540b99eb74a764a28189d.pdf?index=trueIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_75047aba4a55419b8e79aafadd379437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/45420405254.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/printable_english_worksheets_for_5th_grade.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_off0000d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 5588 bytes
SHA-256: 3df2e5444d2f10e7c6d41f85ee5b67b11c26c13529c157f2039a416574b6a4cd
font_01_sfnt_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 10116 bytes
SHA-256: 7140664b7cecd2e33a5e656eb6fcb2d7930f7e143f652ab00fce616c4efcd7fc

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