Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa70071492858504…

MALICIOUS

PDF

91.1 KB Created: 2021-05-21 22:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f70442a361a914a8cb1105c61dbf48ae SHA-1: dad90fa586d7ac066b946adaf4afe19d80e6ffa9 SHA-256: fa700714928585049b799e2f8c1caba985e93fa7af9e31b2da5f47f628193e53
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=boutonniere+deformity+radiology PDF link annotation
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/8045446.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/kafulive_fupivotagojavur_sagaj.pdfIn PDF document text
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/5013635.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/pagaf-renaxekele-zefanarosivodox.pdfIn PDF document text
    • https://sizonijuza.weebly.com/uploads/1/3/4/5/134594560/raxepogasokijij_jedikegolisuki_misodowuzir.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/dajenafexusokipofumi.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/nubegi.pdfIn PDF document text
    • https://widobane.weebly.com/uploads/1/3/4/3/134340358/nexofori.pdfIn PDF document text
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/nakoma_zadazo_kobidunu_figuniwuxun.pdfIn PDF document text
    • https://kifowufowuvix.weebly.com/uploads/1/3/5/3/135392599/ae88dadd899.pdfIn PDF document text
    • https://nubesojobe.weebly.com/uploads/1/3/1/3/131398221/vodujunogokikolafig.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/mekaxakupo_farulu_tefibaleluv_zafanabujofunir.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/luvalamorefemevuze.pdfIn PDF document text
    • https://kovunigok.weebly.com/uploads/1/3/5/3/135317038/fufopo-gebufosibojoxav-ponak.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/mutirexa/pavefironikovuta.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/96883764039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce106c4c-08da-49e5-a495-b8933b84ffd5/95117393786.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/jatodepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe5faa3-d2a7-4e80-b401-55196a66e9ea/48216885266.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/69539166513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1b406c-268d-4d44-b4d4-f16f59e3ae89/new_bollywood_full_hd_mkv_movie_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/north_atlantic_treaty_organization_aims.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_off00012787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12787 5200 bytes
SHA-256: 2e4f3d9e3f3f9dfe94f2a52f3589b1728d46e2aeac0cba1326542523ab2a49c4
font_01_sfnt_off00013935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13935 11312 bytes
SHA-256: 12cbf44f074749a820142b939b54c485467594469521d5ef4bd8f10a754cbc5d

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