Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e38f437976372a…

MALICIOUS

PDF

88.2 KB Created: 2021-02-23 08:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1ed82ed787df6eb346acb6a6b924308b SHA-1: 183b560e18461d5764a5efb9c0efcd9ea43f7b09 SHA-256: d0e38f437976372a41d6d1f99887e7180324d637eda42c1344c4fd67249cb19d
186 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for brand-impersonation credential phishing, specifically impersonating Microsoft. The document body is heavily obfuscated, but the presence of numerous external links, including one to a Weebly subdomain, suggests a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/e4573d0998d8.pdf.
  • 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://bologen.ru/wix?keyword=how+mla+format+a+worksheet+answers PDF link annotation
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/e4573d0998d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_602ebc26bb738.pdfIn PDF document text
    • https://cdn.sqhk.co/sokodajep/gemjhif/53121139015.pdfIn PDF document text
    • https://cdn.sqhk.co/sarokuneti/cEgfmhc/yandex_disk_linux_sync.pdfIn PDF document text
    • https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/sozavozamoza.pdfIn PDF document text
    • https://cdn.sqhk.co/votawusebak/iadulhg/2020_ford_mustang_shelby_gt500_super_snake_price.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/gMhbzBS/ncert_7th_class_science_book_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/fhjQhdg/zojowulapigip.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/iagjjdM/rudaxet.pdfIn PDF document text
    • https://cdn.sqhk.co/dokadajij/ejfjahb/gozurorufufudodavex.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/R1ntQ5F/home_pony_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/119vY8w/xozuxapajet.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/lgiLqhd/begefosetedotev.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/dosox.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/arEdDXr/castle_down_game_of_siegers.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hiNOhhE/vofanapimurivezataw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zafokogilose.rf.gd/amscope_microscope_camera_software.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/coupon_template_psd_free.pdfIn PDF document text
    • http://kufekamulez.rf.gd/jikikedakema.pdfIn PDF document text
    • http://vonubopoz.rf.gd/what_is_organizational_structure_in_healthcare.pdfIn PDF document text
    • http://gedamodeges.epizy.com/pandas_cheat_sheet_jupyter_notebook.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_off00011e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7C 5124 bytes
SHA-256: 90bdd6170dc8eb5a8231f9373c73ab3833c23f58bec00b4b6298523edf3b6df3
font_01_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 10364 bytes
SHA-256: dbd21b4b8e860427545f5217a636a2fd3b59b0ec4dad1dd5a0cbeefb378a3d7c