Malicious PDF — malware analysis report

Static analysis result for SHA-256 4711cd52d9b9cf6c…

MALICIOUS

PDF

39.5 KB Created: 2020-11-06 18:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 584e0765f5561191919b4211526a4f7e SHA-1: dfbeee9a67bcefa36f0e2b1b27c7eef979b93c6d SHA-256: 4711cd52d9b9cf6c64797168cd3c45072043d54b2437da82f9d38add707bbf8f
66 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 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 1.0000

Heuristics 4

  • 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://traffine.ru/aws?keyword=shooting+hoops+mean PDF link annotation
    • https://gekojufoj.weebly.com/uploads/1/3/4/4/134438070/butaz-ratemoxozeb.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/6332635.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/72411da.pdfIn PDF document text
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/kuburotax-tomitabu-xedijopibom-vepilidi.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/jodotiso.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/belopudevuzuza/words_with_exl.pdfIn PDF document text
    • https://navisemuzezo.files.wordpress.com/2020/11/fiwiluwavorajotekiwukoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563aa50b-6f4a-4c7f-855c-280ce7995502/mountain_springs_spas_owners_manual.pdfIn PDF document text
    • https://nelavikix.files.wordpress.com/2020/11/sejupuziw.pdfIn PDF document text
    • https://fidutevobodu.files.wordpress.com/2020/11/xowifotitebovamebiposin.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/74822692297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96f4e4a-0d52-45a8-896c-a366805c5d7c/ligemixabiwajorozefoxa.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.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_off00005a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8D 5208 bytes
SHA-256: 9464ac69918039cf6c45b950159f00abbc6d6cff867df2f6df2370b41afac319
font_01_sfnt_off00006c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C20 10916 bytes
SHA-256: 2d90e6c81ddcee61a14f71a4493b70e1ed936370c23e1e26692c9486635793b1

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