Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed91e3fcd3d8cba1…

MALICIOUS

PDF

92.0 KB Created: 2021-04-05 04:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7183ebf44c0c5f668cecd8f81c4bfe17 SHA-1: af89a994f8c504985f704ae95786ede35b92e7d0 SHA-256: ed91e3fcd3d8cba137f05c6ead1b1a3bed572887bf6672e81448676c10d5e516
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were extracted, the document's structure and URL patterns point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/aws?utm_term=fallout+4+dlc+weapon+codes PDF link annotation
    • https://cdn.sqhk.co/zumumolebajo/WMUXNjd/homeschool_sports_programs_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/FljaJhh/rotunupofunarefidax.pdfIn PDF document text
    • http://merishwheelrecords.com/78779341397gstx3.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/bffgehe/download_tubers_life_simulator_mod.pdfIn PDF document text
    • http://fabermanufacture.ru/611240567715bh1i.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/cuje7L1/sodonupogepadabobebizox.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/wejevukejuga.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ihjjhgg/drastic_ds_emulator_apk_no_license_verification_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/if4iiIO/zombie_farm_minecraft.pdfIn PDF document text
    • http://mailedflkf.site/discussion_essay_samplenck44.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/73TEfil/ava_lockscreen_download.pdfIn PDF document text
    • http://liketime.online/iso_31000_risk_definition042bn.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/how_to_learn_lean.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/HWehhji/48370097784.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/jeZhjif/ohio_police_officer_salary_lookup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_59ae0944f76545cb8a1ff55a18968c2d.pdf?index=trueIn PDF document text
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_aecb0d3c9a634e2e8d4e9bc841a2f635.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_2f0abb498bfc4e6191df344982d137e2.pdf?index=trueIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/25968457706.pdfIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_975e1d2c14fa42aa9ca08ac2436abb65.pdf?index=trueIn PDF document text
    • http://koxigumom.onlinewebshop.net/cartesian_product_example.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_04323e7749c246a48597b2003743ab87.pdf?index=trueIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_643057a4a6c24e158630ffbd849dbe49.pdf?index=trueIn PDF document text
    • http://mejumobax.atwebpages.com/how_to_be_a_capitalist_without_any_capital.pdfIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_083d8f84e7cb4186a24b9be28846a2be.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_off0001253a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253A 5108 bytes
SHA-256: 7674d304cf2f350eedae2b1554d3e579e4ef10026430c28b977a5fd9969f9a35
font_01_sfnt_off000136cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CC 13404 bytes
SHA-256: b5bc298c2a302c547a2881165065cc36031fa941e9325f830cfb9f2897206693