Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b422c558bffa2a…

MALICIOUS

PDF

74.6 KB Created: 2021-04-29 10:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 653b6b9547a3bdd3cd1d9420973cf2a9 SHA-1: c8ee28408cdf61771e9fd8e0706762deb027fd20 SHA-256: 23b422c558bffa2a3edd21bc126f2774f05d12b0929569aacc45442e909ca507
126 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable domains and are likely part of a link farm. The document body mentions 'Hp officejet 6700 ink cartridge reset', suggesting a lure to trick users into clicking these links. The ML classifier strongly flagged this PDF as malicious, and the presence of many external URIs indicates an attempt to redirect users to potentially harmful content, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=hp+officejet+6700+ink+cartridge+reset PDF link annotation
    • http://lifegirls.site/98571019160vw66b.pdfIn PDF document text
    • http://pipvip.ru/fozupevovinesabevex7lifp.pdfIn PDF document text
    • http://mugurapit.sportsontheweb.net/500_english_words_with_meaning.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/1e7274d20dcec4.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/sesijobomixetebob.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/79de98ca7f95.pdfIn PDF document text
    • https://kasesutibut.weebly.com/uploads/1/3/4/0/134017634/bodilebiluxowaki.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/76814.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/nodefaledesopo.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/3c175e5d428d887.pdfIn PDF document text
    • http://xezawavebavulem.iblogger.org/admiral_mcraven_make_your_bed.pdfIn PDF document text
    • http://xifemimuxudita.22web.org/12503412433.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/propiedades_fisicas_de_alcanos_alquenos_y_alquinos.pdfIn PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/majazuvufufupaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://junulobexatini.rf.gd/crystal_reports_runtime_10._5._2._0.pdfIn PDF document text
    • https://311919ef-92bb-434b-a93e-382c1a5e2e65.filesusr.com/ugd/c893b4_091962b9724c465cabe49204af104071.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_c18880fa6bb741b8bad1f0c8d25b5e7e.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_f6c188965a9d42b185d6b9266915d1b9.pdf?index=trueIn PDF document text
    • http://nolukufanalo.epizy.com/jotovi.pdfIn PDF document text
    • http://lidikulogape.rf.gd/adobe_reader_apk_cracked.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

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_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 5768 bytes
SHA-256: 9769c788a1b40d3043b4eb14563d7bf5148effa4cff4f2a0249accf71dc3c110
font_01_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 10584 bytes
SHA-256: fd6147b871d15708857cf81ad4be565343b312346def1411a6b5fb9fc61fb363

Open this report in the interactive analyzer, or submit your own file for analysis.