Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4eeec4a12fa9a92…

MALICIOUS

PDF

74.8 KB Created: 2021-03-30 10:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 337a20cb6b8ee1c177308fa3bceda7dd SHA-1: b1fcc5abdac02a50f91aaf2c6375538acbab899a SHA-256: e4eeec4a12fa9a923692a00a2cf9b0f85041e6af58f7dca5b296b090b00603ab
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=free+english+worksheets+for+4th+grade PDF link annotation
    • http://bigwin-1xbet.fun/world_at_arms_hack_apk_4._2._4d0dvmm.pdfIn PDF document text
    • http://miiliioner.xyz/69306888559j1af6.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/0jbFhbj/2007_chrysler_sebring_touring_owners_manual.pdfIn PDF document text
    • http://poradoit2.site/pemerutizabnder0.pdfIn PDF document text
    • http://biolinkus.me/219863255119g7q2.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/Kibhhgi/detective_conan_movie_2019_release_dates.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/nefomojuwet/xewifatelagipe.pdfIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_34d8bbedf3c74e98ae106bac1c1b6a94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/36571501960.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/el_vendedor_mas_grande_del_mundo.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_137fb6003161416eb3f216e16d08e35a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac1095f-cd18-46f2-bf44-1e78d6db5cfe/tragedy_of_the_commons_environmental_science_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3757b358-c9fc-4cd4-9f16-0d8fecd6d42f/kiwujazusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f638fefc-3aa7-41a6-8183-1133f975366a/gonasiwalawenosojudiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180d6eec-9cb3-4ae2-b069-c224672097d8/maxevabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab8d60c-ce52-4544-af6f-23c04f5d03a2/54439517317.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_d3c2923f715043138b3ba9d9ede7bf40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davawina/zosaxorewutovusofiwof.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/mapa_lineas_cercanias_madrid.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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 5368 bytes
SHA-256: 33fba7febc833d2cad5cbc550a32f5e125d268a3c3f6be0fe6edc9d2db0a581f
font_01_sfnt_off0000f6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A2 11280 bytes
SHA-256: 1b4bbea955bad247b22bc30dfd52f6f212debcf350e0226fc1eede0a832dd42e

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