Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4722fcb912f99c1…

MALICIOUS

PDF

80.9 KB Created: 2021-04-05 03:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d43295a85cd604aa762eea9c268a546c SHA-1: c614b814dfd2682c61fb93097874c3236497c36b SHA-256: d4722fcb912f99c1d7e2d7180a292b851ff88a965f2254a55e936aa8678ff629
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous external URIs pointing to disposable hosting. The PDF structure and embedded URLs suggest it functions as a link farm, likely intended to redirect users to phishing sites or download further malicious content. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/aws?utm_term=pit+bike+race+carb PDF link annotation
    • http://zodelem.mygamesonline.org/amistar_syngenta.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/nurokofegebanodisobujole.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/commutative_rings_with_zero_divisors_huckaba.pdfIn PDF document text
    • http://salet.store/ejercicios_de_molaridad_de_disolucionesdsn2y.pdfIn PDF document text
    • http://logawedulukudan.mywebcommunity.org/worcester_system_boiler.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/65713226664.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/tuvopezuxorozisopijibopum.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_f56190e668104f2fbb3fe42814b3d609.pdf?index=trueIn PDF document text
    • http://naranosufok.atwebpages.com/rozabodawoj.pdfIn PDF document text
    • http://surobufalinaxis.epizy.com/4545327254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1083b0-2ea7-4938-bd5c-3a7c8e13d0a5/10734004545.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/zupamokavozuwurejo.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_fe83fdcd924a451b9c58a13496211a76.pdf?index=trueIn PDF document text
    • http://lunofalogejutu.epizy.com/fupodatidofetefavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7476ed3e-c6fd-4fd1-93f8-6fe81a4e28e0/don_juan_demarco_selena_song.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_8a361df509894af09d32ac93a6dd5ec0.pdf?index=trueIn PDF document text
    • http://sopexas.epizy.com/60174682943.pdfIn PDF document text
    • http://wopojewatomajam.rf.gd/gapunixutoroseferurake.pdfIn PDF document text
    • http://wijijatalil.epizy.com/momivaturivofobowenibed.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_334f4659bfff4f16af2a352dfc0222e7.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_off0001014a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014A 4788 bytes
SHA-256: f8590e586c07b4030dfa818b25a0fbf7f7a7296c128ffe2d040a71a49c5e9a73
font_01_sfnt_off000111a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A4 10984 bytes
SHA-256: d2690176524c10fe282f936e2ca2c30f4f24797e9d8944cf4382671153147337

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