Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aab7a27ba988d11…

MALICIOUS

PDF

67.3 KB Created: 2021-02-17 02:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 65b2df0343dd6c1f51861abdb4cb09cc SHA-1: b406cd0422f49c0d15687f5d9f7179761f7942f7 SHA-256: 6aab7a27ba988d11982dae962bbec2bb5aac746005c2cd2fd74c98f587728f6a
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 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/aws?utm_term=carrier+58sta090-14+inducer+motor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477147/normal_5fef5094736e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_602c604b57d73.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/38032799.pdfIn PDF document text
    • http://sonabalule.iblogger.org/dilexojizopebowanimazuxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_6021d30af0d59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6015c560d785b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_601dd371cd810.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/9213604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500904/normal_60017bc5d6b61.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/084134a329c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guligakifiw.epizy.com/bidewidezeveb.pdfIn PDF document text
    • http://kufuravolej.rf.gd/razaratamadukobejewese.pdfIn PDF document text
    • http://velawomonoxejuz.epizy.com/libro_el_pequeo_vampiro_en_peligro_gratis.pdfIn PDF document text
    • http://somifinufax.rf.gd/ruzutarexedilabevegulaj.pdfIn PDF document text
    • http://gugakalorezo.epizy.com/kuzivofetafuzorexarigegog.pdfIn PDF document text
    • http://zawuzujuw.epizy.com/poxexewezijobunedixak.pdfIn PDF document text
    • http://vopepogam.rf.gd/3644545780.pdfIn PDF document text
    • http://dixolasafu.epizy.com/actualizar_navegador_chrome_android.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_off0000c9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D7 5748 bytes
SHA-256: 414b45e6fc5ba7defe19d98068336b26d0b6a56a74c174998f9fd622539216f6
font_01_sfnt_off0000dd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5B 10232 bytes
SHA-256: bf3c534444b8536468bab19191c1d9d4dc80c6aba934be1588f72ae202f2ed12

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