Malicious PDF — malware analysis report

Static analysis result for SHA-256 e562fa8c4abf9558…

MALICIOUS

PDF

44.5 KB Created: 2020-11-09 10:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 90fbe3755d76fb1418c48bb06833782a SHA-1: dbd417390721a49ae9bf159b6a91ec1a02f6e391 SHA-256: e562fa8c4abf9558f04080c13b4cb8fb1503ececadd675c93f3e84be030942ed
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://trafffe.ru/123?keyword=vizio+e601i-a3+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f8b9beb76d3a.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/bikomof_raxopekexoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fa75873f3554.pdfIn PDF document text
    • https://selamosufuk.weebly.com/uploads/1/3/4/4/134463567/ziporawen.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.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/mesotodimus/hunger_games_parental_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/all_movies_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/nusid.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/cardiomyopathy_pathophysiology.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/61627835936.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/pan_card_application_form_for_nri.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/speech_on_kashmir_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/loan_processor_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/clone_hero_charts_reddit.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_off00006ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDD 5204 bytes
SHA-256: b8b24c354b00dc883dded1830b358d23573ffde4e48a7e3b49f955b281e17d6d
font_01_sfnt_off00007fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBC 11340 bytes
SHA-256: bc5165082aa2e7a9eb43a426229ac3951d7f56c0439ae508053be9670fbbc2cd

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