Malicious PDF — malware analysis report

Static analysis result for SHA-256 57836b5c56bbace9…

MALICIOUS

PDF

69.4 KB Created: 2020-11-23 14:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e9a884ed1ab3208a2224bf105ca73a2 SHA-1: 27bb598fb616421c597ea4720d15e5fc87df579b SHA-256: 57836b5c56bbace92b6c379065154cb1ab7899959742a6093c6323966f94bf79
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://traffine.ru/123?utm_term=aroma+rice+cooker+manual+10-cup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422906/normal_5fba7fd4c216c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa40c628e804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5fa4e19579a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_5fb4ae2102f2e.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/04ac323ba38.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/6576417.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://s3.amazonaws.com/lekizopiloref/xopomifuwexifebogo.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/check_writing_template_for_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1ab709-19c9-4870-ae66-0c61c4656c98/shadow_the_hedgehog_iso_xbox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79c7985-ea2f-4aec-bea4-e86fd0adf06f/kawujutibitafeladox.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/38121306710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39dbef1d-3fac-46be-b1d1-d25d44258f5b/kixaxusanuzasidazuxowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1b3f41-28bb-4a19-9253-3edc1b0c59b7/al_maestro_con_cario_resumen.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73C 4984 bytes
SHA-256: 5a0a3d3c1e298d7b2bc2beb8241449357ab773a4acd85e0465e8b4df85cdfc0b
font_01_sfnt_off0000d809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 10308 bytes
SHA-256: 8603e466bc3d24abcda0f11a88d927622cd1a3d31e48c36d7d0ebe76fd045329
font_02_sfnt_off0000fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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