Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f30ede6c724176…

MALICIOUS

PDF

45.4 KB Created: 2020-11-06 04:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8430feea5f90973ad88057128e31ca14 SHA-1: 2d2b0869655ab70248ac6e5d1017c4877b0b3e31 SHA-256: a2f30ede6c724176960f08716492f949f295d7c39ffc465550d22aa5c5397e14
96 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 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 1.0000

Heuristics 4

  • 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://traffking.ru/123?keyword=specific+rotation+equation+chemistry PDF link annotation
    • 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/ce21b917-8e21-4d52-84c5-91ab396055c3/ginujifupom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee045a4-a022-446a-95c4-07c4dcd66e98/97897801473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1b8859-520d-426e-863e-3f6111f6a186/64426911064.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/legewojelarewogubigef.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/skyrim_fire_breath_shout_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588be116-a251-4ad0-8806-c07d9bc3723d/michael_buble_jingle_bells_download_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82aadbda-c503-4d8f-ab49-92381a2ce5b2/niserigoraxoza.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/list_of_awards_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9087aa14-9b67-496f-923d-dbccb627196c/19950250419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84faef3-12fe-4a9a-925e-3e3fb59760c6/wogenofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99248de-104c-487a-9484-a4eef54a085d/11329819393.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/33049360642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7542/9286/files/74235959459.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 3

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_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 5436 bytes
SHA-256: 72ea6fb0d3efa8e9ef0a0b2d042e55afbad0c75a7426e8f8bdde6e96e9749483
font_01_sfnt_off0000728e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728E 11804 bytes
SHA-256: c13e466ec9ffbd9be4e663a2c2f8c2db91e43f917f091457071478162d515b9d
font_02_sfnt_off00009abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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