Malicious PDF — malware analysis report

Static analysis result for SHA-256 0223fbc46bae0181…

MALICIOUS

PDF

83.5 KB Created: 2020-11-11 20:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b66c2790f3030dac5edb792a0ffbbbfd SHA-1: 22710be73de341825ae710c5cf4712cbae27f68c SHA-256: 0223fbc46bae0181748ca7046eef472f915cd4e2e7164186b714b955ec4b717d
164 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 an invoice-themed 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafficel.ru/strik?utm_term=warrior+shredding+program+2.0 PDF link annotation
    • https://gorugofinugiv.weebly.com/uploads/1/3/4/3/134334376/44d504359f368.pdfIn PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/8702913.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/visagogijulep/sosubigoxaluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fba1b56-52fa-41c1-a0be-4391fa9f56a4/vozar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83d2451-4c12-444f-9282-571a1dcca8e4/79697921499.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/16026498114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbcc5ff-2e7e-42ba-b301-e266d8ab4314/82793231282.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/john_banville_the_untouchable.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/sufenigejajiwaji.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/5332765983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1654048-ccb5-4135-ab64-1d6466b36a1f/refemebigidojetoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6912b29e-6940-48df-b7ea-dff9a1a12a73/gagenam.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/learn_fingerstyle_guitar_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1f82d1-db50-4606-a737-552e09f64f0a/xulilosusodimaxilekiwik.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_off00010967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10967 5660 bytes
SHA-256: 96cc989aa73ad1efaa09554a569d8be261e841975eed69d514d86e0345d0f746
font_01_sfnt_off00011c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 10872 bytes
SHA-256: c05e75d1e043dc2513174dd7a1e5d055ca3e6fcd30b9f9fafba3f7f8b68f176e

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