Malicious PDF — malware analysis report

Static analysis result for SHA-256 1808789d2e615a62…

MALICIOUS

PDF

72.5 KB Created: 2021-04-05 02:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f60483241d7500a71d1ed21c8298648f SHA-1: 540e4274a7eb08f6b6720fc4600f5c091eea73a6 SHA-256: 1808789d2e615a62597265159937632812205167cfe76bf3c9f896aaa481fb5f
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'how to become a business lawyer', likely a pretext to drive traffic to malicious sites.

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://zajinet.ru/strik?utm_term=how+to+become+a+business+lawyer PDF link annotation
    • http://befotuke.mywebcommunity.org/jlab_intro_wireless_headphones_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/ij5asib/gijefejaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/igcjhic/usa_today_crossword_printable_version.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/PjegcTe/photo_grid_mixer_apk.pdfIn PDF document text
    • http://bonozowibewoz.mypressonline.com/duratinebivilof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_604a587c7d144.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/eOjfnid/63950988147.pdfIn PDF document text
    • http://palawawez.mypressonline.com/devi_bhagavatam_download.pdfIn PDF document text
    • http://sekizabugurewud.iblogger.org/car_accident_reports_tucson_az.pdfIn PDF document text
    • http://vexumatobivot.iblogger.org/what_causes_a_tcl_tv_screen_to_go_black.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391602/normal_5ff97db43feae.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/matitekajemezisukute.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/g4lja9S/huey_lewis_back_to_the_future_audition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewimidofi.epizy.com/26118390020.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/periodic_table_hd_image.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/84212115884.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/96529698891.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/adanga_maru_tamil_hd_movie.pdfIn PDF document text
    • https://6552665f-f3ce-4070-9f47-7b493df4570a.filesusr.com/ugd/3d88c7_3bd032947d654daabe9c65bb263b0523.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_39f2b209d5354aba813c6c4d1f825a8e.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 5240 bytes
SHA-256: d76f631ef7938a87038d80160a0a48bf74c2a344ccfef59ac7b6ce616a90266a
font_01_sfnt_off0000ef60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF60 10376 bytes
SHA-256: bd7ab3b7bfb483522c32ba4ed3be0ebeef1cc34c6fd65de5cc62ede08665cebe

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