Malicious PDF — malware analysis report

Static analysis result for SHA-256 a580299e9a1a4e1c…

MALICIOUS

PDF

70.3 KB Created: 2021-06-11 01:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1b463e0308eaf926949bcf0b75b8ee4 SHA-1: 74f965de29e9ebaade93fbb37d75e25bd98d5660 SHA-256: a580299e9a1a4e1ccb956b64e0620bae762dbe357d6b7e6358bf28372ee7f7a6
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://smidgel.ru/pbw?utm_term=neon+logo+template+psd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369143/normal_60bed54a40267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_605002a78ee1f.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/gugedidoro_fadowoxevelu_kudufonel_nifevofaled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601c71a5b14b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5ff5334fa5ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_603be49b41643.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/rujotevadopepi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5ffd48673a073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_606c124ac441e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_60bd533911fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_60301ab60d7e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a440561d-66e2-46b5-8c3b-4f672aee7df8/what_is_optimal_nutritional_status.pdfIn PDF document text
    • http://xumefosux.pbworks.com/w/file/fetch/145088547/38181230677.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/w/file/fetch/144709410/4047318369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb7a3e3-60b3-4637-94b3-6c3622dd3463/fudijele.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_off0000ca18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA18 4892 bytes
SHA-256: 9365db2e9733f51a2b3b7aa350ae08378ccf837bd457935fda866b26d59e7a8f
font_01_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 10908 bytes
SHA-256: eeae8ef7dc7dcb20bf065e9a32c70773ae9c7818b4e8af4228a0259fcc709789
font_02_sfnt_off0000fe86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE86 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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