Malicious PDF — malware analysis report

Static analysis result for SHA-256 e375ffbeb79dbc24…

MALICIOUS

PDF

44.1 KB Created: 2020-10-03 04:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3e1564efe8ab7b83f998908612fd460b SHA-1: eb2c293de7e2eb25c96f85249130f34b3083a58f SHA-256: e375ffbeb79dbc245b28e22ca1f45e1b02fa0154e6e11cfb385d8627d892f1dc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a malicious redirector, which is a common tactic for distributing malware. The document body also contains numerous links to PDF files hosted on various domains, suggesting a link farm designed to improve search engine rankings for malicious content. The presence of a 'Password-protected archive handoff' heuristic indicates the document is likely a lure for a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cctraff.ru/pify?keyword=one+direction+up+all+night+zip+file+download In PDF document text
    • http://files.mhhinsurance.com/uploads/1/3/0/7/130776795/8945289.pdfIn PDF document text
    • http://gufezitez.yeoyat-soon.org/uploads/1/3/2/7/132712593/f1ba7b56.pdfIn PDF document text
    • http://funobanet.oostingsfurniture.com/uploads/1/3/1/4/131437490/e41c9b9ed5.pdfIn PDF document text
    • http://files.crstakers.org/uploads/1/3/2/6/132681586/905947.pdfIn PDF document text
    • http://mojabuz.landscapegardenerscamberley.co.uk/uploads/1/3/1/4/131483245/lebajojom.pdfIn PDF document text
    • http://files.eastcobbrugby.org/uploads/1/3/1/8/131872037/juguzubuvug.pdfIn PDF document text
    • http://files.risikat.com/uploads/1/3/1/6/131636886/2361185.pdfIn PDF document text
    • http://jubej.midmerry.com/uploads/1/3/0/7/130740169/fewedowepomot_nitewiwiwi_vidurigupebemiw_kewoxixijuzo.pdfIn PDF document text
    • http://files.sexeyshospital.org/uploads/1/3/1/3/131380177/jirodenedorew-fuduj-kekopupi-digebofepa.pdfIn PDF document text
    • http://files.rhodes32.com/uploads/1/3/0/7/130740325/jemokag_kakofoderit_zidij.pdfIn PDF document text
    • http://gapunimoz.jessiperrywriter.com/uploads/1/3/1/4/131455463/sowadanoligam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/mpow_bluetooth_cheetah_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0293/6477/files/two_step_cowboy_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1465/8980/files/86902522666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5435/8439/files/fiditetakimewukirepexon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6113 5292 bytes
SHA-256: 4c7f1e39d521208658e4fb8d76d412f8c33d6e6a2b5b573bfa5566dcede67dc9
font_01_sfnt_off00007320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 9984 bytes
SHA-256: d17b89b24c051da8a5a027c44db7fc6124a6fec08282a47dc46af64445393bd4
font_02_sfnt_off00009532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9532 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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