Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67b580c3b9f8207…

MALICIOUS

PDF

79.6 KB Created: 2020-11-12 21:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 286e5cf2f09535e917c6fff91a7ee8c6 SHA-1: dcdfe7f593fe35b974650a2bf59477d422a046b7 SHA-256: f67b580c3b9f8207e1a1ec6f54172a2b8c87dc5c7f5da17be3d7c2c5f5c5522d
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://trafficel.ru/aws?utm_term=maven+jasper+reports+version PDF link annotation
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/93af5c97f4.pdfIn PDF document text
    • https://gilepinewuje.weebly.com/uploads/1/3/4/0/134096317/bamage.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/vurikuwabufaz.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/51a2b6e7-bfcc-412a-9c40-59cd672bfa97/65903406983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bd59a1-a030-46c5-afd8-a62ba96dfa03/what_is_a_trace_table_in_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb0f4a1-d28e-49e6-b250-2689b7737d2d/zopel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411d9d90-e079-492f-9e2b-32cb0b7ef687/52649903333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ec0640-113d-42ba-979d-9cf3afc8f2a9/50678334091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c6f9fe-5253-470b-9ed9-91947b0f699b/skyrim_special_edition_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74441d6-82a6-411a-9d3e-2c172cf5afdc/97509892181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60aa287c-517b-415a-8903-79c9adcd255c/kokasagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd586418-4ba7-413c-8492-586bb69edea4/prescripcin_de_las_acciones_laborales.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/kenneth_hagin_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6059cab3-436e-4e04-bafe-e0e2ffe31756/demiketenozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061d2cfa-ca0c-466f-9d06-a34cac888bea/balekiwovejo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000102aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x102AA 25124 bytes
SHA-256: 14711a22999d1a808b22dcb58af2135ced9e354b7c4b8974fb70d14b6fa739db
font_00_sfnt_off0000caf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF8 4924 bytes
SHA-256: 64158d87dae43f4f8d8bc45531d3f67495d48c61291375c3a7d621245ec145f2
font_01_sfnt_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 11336 bytes
SHA-256: b661afa93d62c6268dbd8e673619035acb0a485b9c9342d2ab85ac9d16773ed0

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