Malicious PDF — malware analysis report

Static analysis result for SHA-256 19129a3ad0978035…

MALICIOUS

PDF

40.9 KB Created: 2020-11-09 13:21:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d588fb042c025c6bcee1f9a4ed242946 SHA-1: 1ffc21abb81bbc3adacb711ee94da2f875066283 SHA-256: 19129a3ad097803556317771aaa3ef178235f1c99323ca4749aa755de45fa7ce
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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?keyword=facebook+apk+latest+version+download PDF link annotation
    • https://jeredesuju.weebly.com/uploads/1/3/4/4/134432205/49342b5de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f8872bc33895.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/2321813.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/8807337.pdfIn PDF document text
    • https://vaputonusodi.weebly.com/uploads/1/3/4/4/134493057/pavobogize-norulupin-zutojowosob.pdfIn PDF document text
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/vurutafimet.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/11199f.pdfIn PDF document text
    • https://ratigejav.weebly.com/uploads/1/3/4/5/134576845/8062921.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/xopugup/if_then_formula_in_excel_2010.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_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 5376 bytes
SHA-256: 34237a6ac97c2c0528ddcc58cd06df1a68d33cd08e87bd5722d0486aac236699
font_01_sfnt_off000073d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 10316 bytes
SHA-256: 976f95cf65e82a6e475b3d1ff24051a4a2358dd29971db7efb558075691fcf1c

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