Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788ecf346339afb…

MALICIOUS

PDF

97.5 KB Created: 2021-05-16 19:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0b8fa84784ba6c8a91a6ea2290a2aafe SHA-1: 4780d023857d057c0ce3191ebc8503d05bb49952 SHA-256: 4788ecf346339afbc93730705274d1b2c2c3460e08a709b46a4eb95cb554a59f
66 Risk Score

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 0.9998

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://jumiwimov.ru/strik?utm_term=how+much+does+a+defensive+driving+course+cost PDF link annotation
    • https://cdn.sqhk.co/sovanoniwuva/hh7MsBK/huawei_health_app_download_for_ios.pdfIn PDF document text
    • http://botavubapisod.mywebcommunity.org/google_chrome_website_als_speichern.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/cadbury_vs_nestle_research_report.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/hjidUvV/gagukov.pdfIn PDF document text
    • http://wepisoja.mypressonline.com/how_to_find_the_limits_of_a_piecewise_function_graphically.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/wunusojiserenopefufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_01d3d10cd2ac4977a16da9655c606628.pdf?index=trueIn PDF document text
    • http://zotuxegusam.epizy.com/oxford_english_dictionary_free_for_iphone.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_d8f09e8203034d44a7c4bfa662f4c866.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_a18e337857a54ed58c31da5b4b59fba7.pdf?index=trueIn PDF document text
    • http://tutazex.rf.gd/fit_body_boot_camp_6_week_challenge.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/mulodafominepusasume.pdfIn PDF document text
    • http://detuzexowo.epizy.com/hc_06_bluetooth_module_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/kwikset_910_z-wave_factory_reset.pdfIn PDF document text
    • http://situwosase.myartsonline.com/xewugituvajal.pdfIn PDF document text
    • http://tunopezarogex.epizy.com/29345476293.pdfIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_b9f1a89677ef462591022070e94d2098.pdf?index=trueIn PDF document text
    • http://bototiluwoge.atwebpages.com/tematyczny_sownik_polsko_angielski.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_f32a4dfb571f4904a03648a7dc712f2d.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB9 5516 bytes
SHA-256: 0631305ce173acac30a0d5d0a95adaa908f6eb4fd279e70b3e205dd1a64fd405
font_01_sfnt_off00015167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15167 11308 bytes
SHA-256: b6fba1b6a31e62460eb8020484403096c72f777997034d494b9d4f37a78ec0fc

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