Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e04cd31f1c612a5…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 14:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a7fa5358d087a49f63d99009e40bf9d SHA-1: 5b61bcf1f4daed2c4e24bdbf83da5795d3e63df3 SHA-256: 5e04cd31f1c612a500031f475009bcb29c3395766f4ebbdec8b8202dffbffa01
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=how+to+connect+astro+a50+for+firmware+update PDF link annotation
    • https://wemavejuza.weebly.com/uploads/1/3/4/6/134689468/gotalelazadeb-fufeleteru-tenipulinir-wozolex.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/89849824612.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/tovadorewog.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/roland_td_4_price.pdfIn PDF document text
    • https://kijesutezex.weebly.com/uploads/1/3/5/3/135328712/5575335fea23545.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/6258132.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/382b7465-96b9-43af-9d1b-dbb128a668dd/mansions_of_madness_storage_solution.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_5632d0ada95d459983e5dfb1a0221a25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satulibaren/black_mart_apk_android.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_ef2308cfd0214a70ae6ceeba51f312a2.pdf?index=trueIn PDF document text
    • http://pizitibasowu.atwebpages.com/datulazafonomofapobo.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_c34fdbafdc1e4c9ea349e0d7f7374d0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/wusapeda.pdfIn PDF document text
    • http://voferumupisefag.rf.gd/22140127767.pdfIn PDF document text
    • http://mevonaku.rf.gd/tidakibazavelufe.pdfIn PDF document text
    • http://daxokefi.epizy.com/mobalusabo.pdfIn PDF document text
    • http://zegemipufe.epizy.com/18675754950.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/what_is_social_constructionism_in_psychology.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/wiloluzuwimejire.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/nenatibugirizoruzak.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bahubali_movie_free_in_tamil_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ebc328-1833-4cda-bf4b-6ff3da10f539/zelufeva.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_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 5588 bytes
SHA-256: d0d3e2480eec5d965927cc040372f49b55af4a826250898c6f645101e7096964
font_01_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 11356 bytes
SHA-256: 533b282e7d4b1cd9ca632168cdaf1932bcf882861cdc09c4c9b21133c4e64acf

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