Malicious PDF — malware analysis report

Static analysis result for SHA-256 181b28f28fb8bf13…

MALICIOUS

PDF

90.7 KB Created: 2021-01-06 07:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 998e7202b94ca4aa4310dd41d7e63f57 SHA-1: e512a736794934646de86728d28217f9a308d4f1 SHA-256: 181b28f28fb8bf13b9393629685d9cff27d91b83677196b2b39dc705f557c984
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 0.9996

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://trafftec.ru/aws?utm_term=imagenes+de+manualidades+con+reciclaje+de+carton PDF link annotation
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/1286355.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/IgisjbN/gotoxokadutoridimarebo.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/13d3f063-9dfc-4e22-a05e-39b792e06b1f/lijupef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf740cdd-5a16-4b56-9cff-9cb2d5ec6836/75513391134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4100d5ce-8203-4879-aad3-bb11984097bc/support_details_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae080da2-c29b-460b-b8b5-9b48b06621af/rodonukazaredutogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29bb8d72-c1a9-43c6-a047-747ee98e1cc7/ennai_thedi_kadhal_endra_hd_video_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75e6d1e-de28-4afc-9681-06c800ac9710/kodosive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e60d51-87b5-429b-93d6-5f53584d9333/cats_mentioned_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02604c6a-9176-49b6-973d-d5c72817ba25/jazafoxipedupajifepaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec4834a-3e61-4246-9221-d3ac39c20ccb/tnt_run_fortnite_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926205f0-58e2-4d83-9644-9ef8cb7bda76/capitol_theatre_salt_lake_city.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de6e8e1-5eac-4587-88da-b91ef227b252/96787363184.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 5272 bytes
SHA-256: b04426adb64d444e2630ea5f0e506767ae36dc9598e39e2fe576b41b89acc035
font_01_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 2012 bytes
SHA-256: f29791c577fb8efd97a4133c5aa60f7028e8039184fbef8522f7a35ca0b46ea9
font_02_sfnt_off00012092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 11584 bytes
SHA-256: d6f960265cba6ee4c7d8933176ba77f60791bcf6c4b80558425a088f6b800f73
font_03_sfnt_off00014681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14681 16508 bytes
SHA-256: 9ac3a52a806fead12ecee8418e0d089c2ac983dc660e866ce7a55592b6d7689b

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