Malicious PDF — malware analysis report

Static analysis result for SHA-256 f024137f7952581d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-13 18:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 77c8824034d5f7f5ceba422fbcb113e6 SHA-1: 985b2c7c3aa5256fe41cbcff220d6e4e8527eeaf SHA-256: f024137f7952581d298529469fbf999329d9e2657be10d9ff78173160d361d3c
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 0.9997

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://xajibur.ru/strik?utm_term=how+can+i+kill+toenail+fungus PDF link annotation
    • http://lg-copyright.com/timex_ironman_triathlon_indiglo_not_workingwjuhv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_6034e1794f85f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60174e0d305c5.pdfIn PDF document text
    • http://sarkife.site/gmo_definitionk73d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_602d9313a03e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_602792d428edc.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/vedexajawo/rugilojurufidel.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_e1e46e493e8b4f65927557e2fd0278ec.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_f0aecf8f5c4443cc9da0e148bc32c16a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/womirofop/what_do_the_greek_letters_mean_in_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/crossover_interview_questions_answers.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_47ce8cb2964941ac9f232c87f5ea22e1.pdf?index=trueIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_098009b2d7d34db0990cdc954da5ce97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/15948549422.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/72598814183.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_82a0ee9a17b849549fb3aee4b8a2f690.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_54355b3d75aa4d87ae80a731b5dbe52e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/25425505476.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/iq_test_book_with_answers.pdfIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_4945d422d60646c28dbc01414c9d5d31.pdf?index=trueIn 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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 5072 bytes
SHA-256: 1f00596434bcc45b0b08ebf2555c9712e651d5d989706ae092834e5c1765f5a8
font_01_sfnt_off0000f695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 10624 bytes
SHA-256: cccd339afc7d845ccdd7fc5f6317f8852ec9e97d131bc89b80ab3debc23b57dd

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